4 Aug 2025

🧪New Superfund Tax Regulations on Chemical Substances Impact Businesses

Superfund Tax on Chemical Substances; Notice of Determinations To Add Substances to List of Taxable Substances; Corrected Name and Tax Rate for Sodium Nitrilotriacetate Monohydrate

Summary

This notice of determinations modifies the list of taxable substances to include the following 21 substances: polyphenylene sulfide, cellulose acetate (degree of substitution = 1.5-2.0), 4,4'- isopropylidenediphenol-epichlorohydrin copolymer, nylon 6, caprolactam, methyl ethyl ketoxime, iso-butanol, diethylene glycol monomethyl ether, ethylene glycol phenyl ether, methoxytriglycol, propylene glycol methyl ether acetate, propylene glycol methyl ether, propylene glycol n-propyl ether, propylene glycol phenyl ether, di-isobutyl carbinol, di-isobutyl ketone, methyl isobutyl carbinol, cyanuric acid, potassium bicarbonate, potassium carbonate, and sodium chlorite. This notice also modifies the list included in Notice 2021-66 by correcting a typographical error in the spelling of the name of the taxable substance sodium nitrilotriacetate monohydrate and prescribing a tax rate for sodium nitrilotriacetate monohydrate.

Agencies

  • Treasury Department
  • Internal Revenue Service

Business Impact ?

$$$ - High

The notification outlines the addition of 21 taxable substances to the Superfund tax list, impacting businesses dealing with these chemicals. Companies will need to comply with the new tax obligations starting January 1, 2026. The established tax rates also affect financial planning and supply chain decisions for manufacturers and importers of these substances.

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