Section 4661(b) of the Internal Revenue Code of 1986 is amended to read as follows: (b) Amount of tax (1) In general The amount of the tax imposed by subsection (a) shall be determined in accordance with the following table: In the case of: The tax is the following amount per ton: Acetylene $11.35 Benzene 11.35 Butane 11.35 Butylene 11.35 Butadiene 11.35 Ethylene 11.35 Methane 8.02 Naphthalene 11.35 Propylene 11.35 Toluene 11.35 Xylene 11.35 Ammonia 6.15 Antimony 10.37 Antimony trioxide 8.74 Arsenic 10.37 Arsenic trioxide 7.95 Barium sulfide 5.36 Bromine 10.37 Cadmium 10.37 Chlorine 6.29 Chromium 10.37 Chromite 3.54 Potassium dichromate 3.94 Sodium dichromate 4.36 Cobalt 10.37 Cupric sulfate 4.36 Cupric oxide 8.37 Cuprous oxide 9.25 Hydrochloric acid 0.68 Hydrogen fluoride 9.86 Lead oxide 9.65 Mercury 10.37 Nickel 10.37 Phosphorus 10.37 Stannous chloride 6.64 Stannic chloride 4.94 Zinc chloride 5.17 Zinc sulfate 4.43 Potassium hydroxide 0.51 Sodium hydroxide 0.65 Sulfuric acid 0.61 Nitric acid 0.56. (2) Adjustment for inflation (A) In general In the case of a calendar year beginning after 2021, each of the amounts in the table in paragraph (1) shall be increased by an amount equal to— (i) such amount, multiplied by (ii) the cost-of-living adjustment determined under section 1(f)(3) for the calendar year, determined by substituting calendar year 2020 for calendar year 2016 in subparagraph (A)(ii) thereof. (B) Rounding If any amount as adjusted under subparagraph (A) is not a multiple of $0.01, such amount shall be rounded to the next lowest multiple of $0.01. . (b) Effective date The amendments made by this section shall apply to taxes imposed after December 31, 2020. 5. Section 4671 tax revived with respect to certain chemicals (a) In general Section 4671 of the Internal Revenue Code of 1986 is amended— (1) in subsection (a), by striking substance sold or used by the importer thereof and inserting substance — (A) sold or used by the importer thereof, and