27 CFR § 20.113 - Proprietary solvents general-use formula.

---
identifier: "/us/cfr/t27/s20.113"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "27 CFR § 20.113 - Proprietary solvents general-use formula."
title_number: 27
title_name: "Alcohol, Tobacco Products and Firearms"
section_number: "20.113"
section_name: "Proprietary solvents general-use formula."
chapter_name: "ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY"
subchapter_number: "A"
subchapter_name: "ALCOHOL"
part_number: "20"
part_name: "DISTRIBUTION AND USE OF DENATURED ALCOHOL AND RUM"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "26 U.S.C. 5001, 5206, 5214, 5271-5275, 5311, 5552, 5555, 5607, 6065, 6109, 7805."
regulatory_source: "T.D. ATF-199, 50 FR 9162, Mar. 6, 1985, unless otherwise noted."
cfr_part: "20"
---


# 20.113 Proprietary solvents general-use formula.

A proprietary solvent made pursuant to this formula shall be made with alcohol denatured in accordance with S.D.A. Formula No. 1, 3-A, or 3-C and shall contain, for every 100 parts (by volume) of S.D.A.:

(a) No less than 1 part (by volume) of one or any combination of the following: Gasoline, unleaded gasoline, heptane, or rubber hydrocarbon solvent, and

(b) No less than 3 parts (by volume) of one or any combination of the following: Ethyl acetate (equivalent to 85 percent ester content, as defined in § 21.107 of this chapter), methyl isobutyl ketone, methyl n-butyl ketone, tert-butyl alcohol, sec-butyl alcohol, nitropropane (mixed isomers), ethylene glycol monoethyl ether, or toluene.

[T.D. TTB-140, 81 FR 59457, Aug. 30, 2016]