2026-18264Notice

IRS Eyes Tax on Ultra-Specific Copolymer: w=124.79, x=424.05 – Seriously?

Published Date: 9/9/2026

Notice

Summary

This notice of filing announces that a petition has been filed requesting that butadiene-acrylonitrile-methyl methacrylate-styrene copolymer ((C<INF>4</INF>H<INF>6</INF>)<INF>w</INF>(C<INF>3</INF>H<INF>3</INF>N)<INF>x</INF> (C<INF>8</INF>H<INF>8</INF>)<INF>y</INF>(C<INF>5</INF>H<INF>8</INF>O<INF>2</INF> )<INF>z</INF>; w=124.79, x=424.05, y=129.62, z=72.41), also known as "Modified SAN Latex," be added to the list of taxable substances. This notice of filing also requests comments on the petition. This notice of filing is not a determination that the list of taxable substances is modified.

No Economic Impacts Identified for this Document

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Key Dates

Published Date
9/9/2026

Department and Agencies

Department
Independent Agency
Agency
Treasury Department
Internal Revenue Service
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