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                                                                                                Department of the Treasury
                                                                                                Internal Revenue Service
Instructions for Form 6627

(Rev. January 2023)
Environmental Taxes

Section references are to the Internal Revenue Code unless        Form 720, Quarterly Federal Excise Tax Return. See Pub. 510, 
otherwise noted.                                                  Excise Taxes, for more information on environmental taxes. See 
                                                                  the Instructions for Form 720 for information on when and where 
Future Developments                                               to file Form 6627.
For the latest information about developments related to Form 
6627 and its instructions, such as legislation enacted after they Who Must File
were published, go to IRS.gov/Form6627.
                                                                  For Petroleum
What’s New                                                        1. The operator of the refinery that receives crude oil;
        Due to the IRS' acquiescence in a recent court case, the  2. The user of crude oil before tax is imposed; and
  !     section 4611 tax on exported crude oil currently doesn’t  3. The person entering the petroleum products for 
CAUTION apply. See AOD 2023-01, at IRS.gov/Actions on             consumption, use, or warehousing.
Decisions.
  The Inflation Reduction Act of 2022 reinstates the section      For Chemicals (other than ODCs)
4611 Hazardous Substance Superfund financing rate (petroleum      The manufacturer, producer, or importer of chemicals who sells 
Superfund tax rate) on domestic crude oil and imported            or uses those chemicals.
petroleum products, effective January 1, 2023. See Part I. Tax 
on Petroleum (IRS Nos. 16, 18, 21, and 53), later.                For Imported Chemical Substances
  The section 4681 tax rates for ozone-depleting chemicals        The importer of substances who sells or uses those substances.
(ODCs) are increased for 2023. See Part VI. Tax on Floor 
Stocks of ODCs, later.                                            For ODCs
                                                                  1. The manufacturer or importer of ODCs who sells or uses 
Reminders                                                         those ODCs;
The Infrastructure Investment and Jobs Act reinstates the         2. The importer of taxable products who sells or uses those 
section 4661 excise tax on chemicals (other than ODCs) and the    products; and
section 4671 tax on imported chemical substances, effective       3. The person other than the manufacturer or importer of 
July 1, 2022 (they previously expired on December 31,1995).       ODCs who holds ODCs for sale or use in manufacturing on 
• The tax rates for chemicals (other than ODCs) are listed on     January 1, 2023.
Form 6627, Part II.
• See Table of Taxable Imported Chemical Substances for a 
listing of taxable imported chemical substances and the           Specific Instructions
IRS-provided tax rates for most of the substances. Any 
additional tax rates the IRS provides will be available either    Part I. Tax on Petroleum (IRS Nos. 16, 18, 21, 
online or in the Table of Taxable Imported Chemical Substances    and 53)
when they become available. Taxpayers are reminded that they 
may calculate their own tax rates for imported chemical           The tax rate on domestic crude oil and imported petroleum 
substances, regardless of whether the IRS has provided a tax      products is the sum of the Oil Spill Liability Trust Fund financing 
rate.                                                             rate (petroleum oil spill tax rate) and the Hazardous Substance 
• Rev. Proc. 2022-26 provides procedures for requesting a         Superfund financing rate (petroleum Superfund tax rate). The 
determination that a substance be added or removed.               petroleum oil spill tax rate is $0.09 per barrel. For 2023, the 
• See Notice 2022-15 for information about temporary relief       petroleum Superfund tax rate is $0.164 per barrel (this rate will 
from the penalty for failure to deposit the 2022 third and fourth be indexed annually for inflation).
quarter taxes.                                                    Although the domestic crude oil or imported petroleum 
• For updates, such as the not yet shown tax rates for taxable    products are reported separately, there is no difference in tax 
imported chemical substances, or substances recently added or     rates. For domestic crude oil, report the petroleum oil spill tax 
removed, go to IRS.gov/Form6627. Also see frequently asked        rate on IRS No. 18 and the petroleum Superfund tax rate on IRS 
questions and answers.                                            No. 53. For imported petroleum products, report the petroleum 
                                                                  oil spill tax rate on IRS No. 21 and the petroleum Superfund tax 
                                                                  rate on IRS No. 16.
General Instructions
                                                                  Crude oil.  Tax is imposed on domestic crude oil when it is 
Purpose of Form                                                   received at a U.S. refinery. Crude oil includes crude oil 
Use this form to figure the environmental taxes on domestic       condensates and natural gasoline. The operator of the refinery is 
crude oil and imported petroleum products, chemicals (other       liable for the tax. Tax is imposed on imported crude oil received 
than ozone-depleting chemicals (ODCs)), imported chemical         at a U.S. refinery unless the imported petroleum products tax 
substances, ODCs, imported products that used ODCs as             was imposed when the imported crude oil was entered into the 
materials in the manufacture or production of the product, and    United States. The operator of a U.S. refinery that receives 
the floor stocks tax on ODCs. If you need more lines for any part imported crude oil must establish that tax was previously 
of the form, prepare a continuation sheet using the same format   imposed on the imported crude oil.
as the part. Attach the continuation sheet with Form 6627 to 

Mar 14, 2023                                                   Cat. No. 11548F

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User of crude oil.  Tax is imposed on domestic crude oil that’s           rate, multiply column (b) by column (e). If you don’t have enough 
used before it is received at a U.S. refinery. The user is liable for     information to determine the conversion factor and the IRS 
the tax. Crude oil used for extracting oil or natural gas on the          hasn’t provided a tax rate, you must use the appraised entry 
premises where the crude oil is produced is not taxable.                  value to figure the tax. To figure the tax using appraised entry 
                                                                          value, multiply the appraised entry value in column (d) by the 
Imported petroleum products.     Tax is imposed on imported               rate (10%) in column (e).
petroleum products when they are entered into the United States 
for use, consumption, or warehousing. Petroleum products                  Part IV. Tax on Ozone-Depleting Chemicals 
include crude oil, refined and residual oil, and other liquid 
                                                                          (ODCs), IRS No. 98
hydrocarbon refinery products. The person entering the 
petroleum product into the country is liable for the tax.                 The following ODCs are taxable.
The tax on petroleum is imposed only once on any imported 
petroleum product. The enterer must provide documentation of 
the tax imposed on imported crude oil to the refinery operator if 
requested by the refinery operator.                                       Post -1989 ODCs                                                       Tax per
Fractional barrels. Fractional barrels are taxed at a                                                                                   Pound in 2023
proportionate rate using the fraction produced by the number of 
gallons in the barrel over 42 gallons. Multiply the resulting             CFC-11  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $17.95
fraction by the sum of the $0.09 per barrel petroleum oil spill tax       CFC-12  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  17.95
rate and the $0.164 per barrel petroleum Superfund tax rate.
                                                                          CFC-113 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    14.36
Part III. Tax on Imported Chemical Substances,                            CFC-114 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    17.95
IRS No. 17                                                                CFC-115 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    10.77
The imported chemical substance tax is equal to the chemical 
tax that would have been imposed on the taxable chemicals                 Halon-1211  . . . . . . . . . . . . . . . . . . . . . . . . . . . .    53.85
(listed in Part II of Form 6627) used as materials in the                 Halon-1301  . . . . . . . . . . . . . . . . . . . . . . . . . . . .   179.50
manufacture of the substance if such substance had been 
manufactured in the United States. See Table of Taxable                   Halon-2402  . . . . . . . . . . . . . . . . . . . . . . . . . . . .   107.70
Imported Chemical Substances for the substances to which the              Post-1990 ODCs                                                        Tax per
imported substance tax applies.                                                                                                         Pound in 2023
To figure the tax, you’ll generally need to know the ratio of the         Carbon tetrachloride . . . . . . . . . . . . . . . . . . . . . .       19.74
weight of each taxable chemical used to make the substance to 
the total weight of the substance (the conversion factor). If you         Methyl chloroform . . . . . . . . . . . . . . . . . . . . . . . .      1.79
don’t have enough information to determine the conversion                 CFC-13, CFC-111, CFC-112, and CFC-211 through 
factor and the IRS has provided a tax rate for the substance,             CFC-217 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    17.95
either online or in Table of Taxable Imported Chemical 
Substances, then that tax rate applies. If you don’t have enough 
information to determine the conversion factor and the IRS                        The tax per pound rates above are figured using the 
hasn’t provided a tax rate for the substance, then the tax is 10%         !       ozone-depletion factor. Do not multiply the tax per 
of the appraised entry value of the substance.                            CAUTION pound by the ozone-depletion factor.

Follow the steps, next, to figure the tax for Part III, lines 1           Mixture elections.    Generally, the creation of a mixture 
through 3.                                                                containing one or more ODCs by the manufacturer or importer of 
Column (a). Enter the imported chemical substance subject to              an ODC is treated as the use of the ODC in the mixture. 
tax.                                                                      However, the manufacturer or importer may elect to treat the 
                                                                          sale or use of the mixture as the first sale or use of the ODC in 
Column (b). Enter the number of tons of the substance                     the mixture.
imported and sold or used.
                                                                          Post-1989 ODCs (the 1990 election).                   If this election is 
Column (c). Enter each taxable chemical (listed in Part II of             made, the tax on the post-1989 ODCs (listed earlier) contained 
Form 6627) used in the manufacture of the substance. If using             in the mixture is imposed on the date of sale or use of the 
an IRS-provided tax rate or a tax rate based on 10% of the                mixture. To make the election, check the first box in Part IV, 
appraised entry value of the substance, there’s no need to enter          under Elections. This election may be revoked only with the 
information in column (c).                                                consent of the IRS.
Column (d). Enter the conversion factor for each taxable                  Post-1990 ODCs (the 1991 election).                   If this election is 
chemical or the appraised entry value of the total amount of the          made, the tax on the post-1990 ODCs (listed earlier) contained 
substance. If using an IRS-provided tax rate, there’s no need to          in the mixture is imposed on the date of sale or use of the 
enter information in column (d).                                          mixture. To make the election, check the second box in Part IV, 
                                                                          under Elections. This election may be revoked only with the 
Column (e). Enter the tax rate of each taxable chemical from              consent of the IRS.
Part II of Form 6627. If you don’t have enough information to 
determine the conversion factor and are using an IRS-provided             Column (c). Enter the tax per pound using the chart earlier.
tax rate, enter that tax rate here. If you don’t have enough 
information to determine the conversion factor and you’re                 Part V. ODC Tax on Imported Products, IRS No. 
figuring the tax based on appraised entry value, enter 10% here.          19
Column (f). Multiply the number of tons in column (b) by the              An imported taxable product is any product entered into the 
conversion factor in column (d) by the rate in column (e) for each        United States for consumption, use, or warehousing if any ODC 
taxable chemical listed. If you don’t have enough information to          was used as material in the manufacture or production of the 
determine the conversion factor and the IRS has provided a tax            product. The product must also be listed in the imported 

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products table issued by the IRS. See Regulations section                multiply the 1% (0.01) rate in column (d) by the entry value in 
52.4682-3(f)(6). The tax is based on the weight of ODCs used in          column (e).
the manufacture of the product. If the weight can’t be determined 
under the exact method or table method (see below), the tax is           Part VI. Tax on Floor Stocks of ODCs
1% of the entry value of the product (value method).                     The floor stocks tax for 2023 is imposed on the following ODCs.
Importer election.  Generally, an imported taxable product is 
taxed when sold or used by the importer. However, an importer 
may elect to treat the entry of products into the United States as       ODCs                                                                   Tax per
the use of such products. This election applies to all products                                                                         Pound in 2023
held by the importer when the election becomes effective, and 
all products the importer enters into the United States after the        CFC-11   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $0.45
election becomes effective. If an election applies to an imported        CFC-12   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  0.45
taxable product, tax is imposed on the product on the date of 
entry. To make the election, check the box in Part V, under              CFC-113  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    0.36
Elections.This election may be revoked only with the consent of          CFC-114  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    0.45
the IRS.
                                                                         CFC-115  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    0.27
Figure the ODC Weight of the Product as Follows                          Halon-1211   . . . . . . . . . . . . . . . . . . . . . . . . . . . .    1.35
Exact method.    If you determine the weight of each ODC                 Halon-1301   . . . . . . . . . . . . . . . . . . . . . . . . . . . .    4.50
used as a material in the manufacture of the product and you 
can support this determination, the ODC weight is the weight             Halon-2402   . . . . . . . . . . . . . . . . . . . . . . . . . . . .    2.70
you determine.                                                           Carbon tetrachloride . . . . . . . . . . . . . . . . . . . . . .       0.495
Table method.    If you don’t use the exact method and the 
ODC weight is listed in the imported products table, use the             Methyl chloroform . . . . . . . . . . . . . . . . . . . . . . . .      0.045
ODC weight listed to figure the tax. See Pub. 510 for more               CFC-13, CFC-111, CFC-112, and CFC-211 through 
information.                                                             CFC-217  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    0.45
Follow the steps, next, to figure the tax for Part V, lines 1 
through 3.                                                                        The tax per pound rates above are figured using the 
                                                                                  ozone-depletion factor. Do not multiply the tax per 
Column (a).  Enter the imported product and the applicable               CAUTION! pound by the ozone-depletion factor.
ODC. Use additional lines if there is more than one ODC.
Column (b).  Enter the number of taxable products imported.              For 2023, you are liable for the floor stocks tax if, on January 
                                                                         1, you hold any of the following.
Column (c).  Enter the ODC weight of the product in pounds. If 
you are using the value method, don’t complete this column.              1. At least 400 pounds of ODCs, other than halons or methyl 
                                                                         chloroform, subject to the floor stocks tax.
Column (d).  Enter the tax per pound from the chart in the               2. At least 50 pounds of halons.
instructions for Part IV, earlier. If you are using the value method, 
enter 1% (0.01).                                                         3. At least 1,000 pounds of methyl chloroform.
Column (e).  If you are using the value method to figure the tax,        Report the tax on Form 6627 and Form 720 for the second 
enter the entry value of the total number of imported products.          calendar quarter of 2023. Payment of the tax is due by June 30, 
                                                                         2023.
Column (f).  Figure the tax due by multiplying the number of 
products in column (b) by the ODC weight in column (c) by the            Column (c).  Enter the tax per pound using the chart above.
tax per pound in column (d). If you are using the value method, 

                      Table of Taxable Imported Chemical Substances (Beginning July 1, 2022)

* Tax rate per ton (Rate/Ton) to be determined at a later date and published at IRS.gov/Form6627 as soon as they become available.
                      Imported Chemical Substance                                           Rate/Ton ($)                          Effective Date
1,3-butylene glycol                                                                               7.28                                7/1/2022
1,4 butanediol                                                                                    4.68                                7/1/2022
1,5,9-cyclododecatriene                                                                           9.74                                7/1/2022
2,2,4-trimethyl-1,3-pentanediol diisobutyrate                                                       *                                 7/1/2022
2,2,4-trimethyl-1,3-pentanediol monoisobutyrate                                                     *                                 7/1/2022
2-ethyl hexanol                                                                                   7.16                                7/1/2022
2-ethylhexyl acrylate                                                                             7.34                                7/1/2022
acetic acid                                                                                         *                                 7/1/2022
acetone                                                                                           20.06                               7/1/2022
acetylene black                                                                                   10.52                               7/1/2022
acrylic acid resins                                                                               5.65                                7/1/2022

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                     Imported Chemical Substance                   Rate/Ton ($) Effective Date
methacrylic acid resins                                            14.94        7/1/2022
acrylonitrile                                                      9.38         7/1/2022
adipic acid                                                        6.13         7/1/2022
adiponitrile                                                       8.57         7/1/2022
allyl chloride                                                     10.38        7/1/2022
alpha-methylstyrene                                                9.93         7/1/2022
ammonium nitrate                                                   1.49         7/1/2022
aniline                                                            9.40         7/1/2022
benzaldehyde                                                       8.47         7/1/2022
benzoic acid                                                       7.31         7/1/2022
bisphenol-A                                                        10.23        7/1/2022
butanol                                                            6.31         7/1/2022
butyl acrylate                                                     6.84         7/1/2022
butyl benzyl phthalate                                             12.15        7/1/2022
carbon tetrachloride                                               10.62        7/1/2022
chlorinated polyethylene                                           10.25        7/1/2022
chloroform                                                         10.51        7/1/2022
chromic acid                                                       4.37         7/1/2022
cumene                                                             9.74         7/1/2022
cyclododecanol                                                     9.05         7/1/2022
cyclohexane                                                        10.02        7/1/2022
decabromodiphenyl oxide                                            17.99        7/1/2022
di-2 ethyl hexyl phthalate                                         7.37         7/1/2022
diethanolamine                                                     6.01         7/1/2022
diglycidyl ether of bisphenol-A                                    13.86        7/1/2022
diisopropanolamine                                                 12.76        7/1/2022
dimethyl terephthalate                                             5.91         7/1/2022
dimethyl-2, 6-naphthalene dicarboxylate                            6.81         7/1/2022
di-n-hexyl adipate                                                 8.23         7/1/2022
diphenyl oxide                                                     13.73        7/1/2022
diphenylamine                                                      10.28        7/1/2022
epichlorohydrin                                                    12.89        7/1/2022
ethyl acetate                                                      *            7/1/2022
ethyl acrylate                                                     4.09         7/1/2022
ethyl alcohol for nonbeverage use                                  5.94         7/1/2022
ethyl chloride                                                     4.52         7/1/2022
ethyl methyl ketone                                                7.60         7/1/2022
ethyl benzene                                                      9.74         7/1/2022
ethylene dibromide                                                 9.03         7/1/2022
ethylene dichloride                                                6.62         7/1/2022
ethylene glycol                                                    4.38         7/1/2022
ethylene oxide                                                     6.23         7/1/2022
ethylene bistetrabromophthalimide                                  *            7/1/2022
ferrochrome ov 3 pct. carbon                                       4.83         7/1/2022

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                     Imported Chemical Substance                   Rate/Ton ($) Effective Date
ferrochromium nov 3 pct.                                           4.83         7/1/2022
ferronickel                                                        *            7/1/2022
formaldehyde                                                       *            7/1/2022
formic acid                                                        *            7/1/2022
glycerine                                                          *            7/1/2022
hexabromocyclododecane                                             9.11         7/1/2022
hexamethylenediamine                                               8.93         7/1/2022
hydrogen peroxide                                                  *            7/1/2022
isobutyl acetate                                                   4.47         7/1/2022
isophthalic acid                                                   6.23         7/1/2022
isopropyl acetate                                                  4.54         7/1/2022
isopropyl alcohol                                                  6.82         7/1/2022
linear alpha olefins                                               9.74         7/1/2022
maleic anhydride                                                   5.75         7/1/2022
melamine                                                           4.28         7/1/2022
methanol                                                           *            7/1/2022
methyl acrylate                                                    5.39         7/1/2022
methyl chloroform                                                  6.37         7/1/2022
methyl isobutyl ketone                                             23.65        7/1/2022
methyl methacrylate                                                14.75        7/1/2022
methylene chloride                                                 10.33        7/1/2022
monochlorobenzene                                                  10.12        7/1/2022
monoethanolamine                                                   5.96         7/1/2022
monoisopropanolamine                                               11.74        7/1/2022
nickel oxide                                                       7.03         7/1/2022
nickel powders                                                     *            7/1/2022
nickel waste and scrap                                             *            7/1/2022
normal butyl acetate                                               4.47         7/1/2022
normal propyl acetate                                              3.73         7/1/2022
nylon 6/6                                                          8.67         7/1/2022
ortho-dichlorobenzene                                              10.35        7/1/2022
ortho-nitrochlorobenzene                                           7.49         7/1/2022
para-dichlorobenzene                                               10.35        7/1/2022
paraformaldehyde                                                   *            7/1/2022
para-nitrochlorobenzene                                            7.49         7/1/2022
para-nitrophenol                                                   8.59         7/1/2022
pentaerythritol                                                    3.86         7/1/2022
perchloroethylene                                                  10.89        7/1/2022
phenol                                                             12.47        7/1/2022
phenolic resins                                                    9.86         7/1/2022
phosphorous pentasulfide                                           2.49         7/1/2022
phosphorous trichloride                                            6.21         7/1/2022
phthalic anhydride                                                 7.01         7/1/2022
poly (69/31 ethylene/cyclohexylenedimethylene terephthalate)       *            7/1/2022

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                     Imported Chemical Substance                  Rate/Ton ($) Effective Date
poly (96.5/3.5 ethylene/cyclohexylenedimethylene terephthalate)   *            7/1/2022
poly (98.5/1.5 ethylene/cyclohexylenedimethylene terephthalate)   *            7/1/2022
poly 1,4 butyleneterephthalate                                    7.21         7/1/2022
poly(ethyleneoxy)glycerol                                         *            7/1/2022
poly(propylene)glycol                                             10.38        7/1/2022
poly(propylene/ethylene)glycol                                    8.84         7/1/2022
poly(propyleneoxy)glycerol                                        *            7/1/2022
poly(propyleneoxy)sucrose                                         2.04         7/1/2022
poly(propyleneoxy/ethyleneoxy)benzenediamine                      *            7/1/2022
poly(propyleneoxy/ethyleneoxy)diamine                             *            7/1/2022
poly(propyleneoxy/ethyleneoxy)glycerol                            *            7/1/2022
poly(propyleneoxy/ethyleneoxy)sucrose                             2.57         7/1/2022
polyalphaolefins                                                  11.37        7/1/2022
polybutadiene                                                     9.74         7/1/2022
polybutene                                                        9.74         7/1/2022
polybutylene                                                      9.74         7/1/2022
polybutylene/ethylene                                             9.74         7/1/2022
polycarbonate                                                     10.84        7/1/2022
polyethylene resins (total)                                       9.74         7/1/2022
polyethylene terephthalate pellets                                6.82         7/1/2022
polypropylene                                                     9.74         7/1/2022
polypropylene resins                                              9.74         7/1/2022
polystyrene homopolymer resins                                    9.93         7/1/2022
polystyrene resins and copolymers                                 *            7/1/2022
polyvinylchloride resins                                          7.46         7/1/2022
propanol                                                          5.47         7/1/2022
propylene glycol                                                  10.38        7/1/2022
propylene oxide                                                   13.60        7/1/2022
sodium nitriolotriacetate monohydrate                             *            7/1/2022
styrene                                                           9.93         7/1/2022
styrene-butadiene (latex)                                         9.84         7/1/2022
styrene-butadiene (snpf)                                          *            7/1/2022
synthetic linear fatty alcohol ethoxylates                        7.12         7/1/2022
synthetic linear fatty alcohols                                   9.29         7/1/2022
synthetic rubber (not containing fillers)                         *            7/1/2022
terephthalic acid                                                 6.23         7/1/2022
tetrabromobisphenol-A                                             14.79        7/1/2022
tetrachlorophthalic anhydride                                     8.95         7/1/2022
tetrahydrofuran                                                   5.78         7/1/2022
texanol benzyl phthalate                                          *            7/1/2022
toluene diisocyanate                                              10.85        7/1/2022
toluenediamine                                                    9.18         7/1/2022
trichloroethylene                                                 10.79        7/1/2022
triethanolamine                                                   6.04         7/1/2022

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                    Imported Chemical Substance                     Rate/Ton ($) Effective Date
triisopropanolamine                                                 12.84        7/1/2022
trimethylolpropane                                                  4.63         7/1/2022
unwrought nickel                                                    *            7/1/2022
urea                                                                3.01         7/1/2022
vinyl acetate                                                       3.83         7/1/2022
vinyl chloride                                                      7.46         7/1/2022
vinyl resins (nspf)                                                 *            7/1/2022
vinyl resins                                                        *            7/1/2022
wrought nickel rods and wire                                        *            7/1/2022

Instructions for Form 6627 (Rev. January 2023)  -7-