---
kind: "section"
citation: "27 C.F.R. § 20.113"
title: "27"
number: "20.113"
heading: "Proprietary solvents general-use formula."
url: "https://uscodex.org/cfr/27/20.113"
---

# §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](/cfr/27/21.107.md) 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.

## Notes

### Amendments

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

### Authority

Authority: 26 U.S.C. 5001, 5206, 5214, 5271-5275, 5311, 5552, 5555, 5607, 6065, 6109, 7805.

### Source

Source: T.D. ATF-199, 50 FR 9162, Mar. 6, 1985, unless otherwise noted.

### Amendments

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