Category: Ethanol Guides

Specially denatured alcohol (SDA 3-A, 3-C, 40-B) requires a TTB industrial alcohol user permit. Completely denatured alcohol such as CDA 12-A does not. Here is how to tell which category your process needs, and what each formula is authorized for.

Denatured ethanol is ethyl alcohol made undrinkable with denaturants, exempting it from federal excise tax. See how SDA and CDA formulas differ and which require a TTB permit.

190 proof ethanol is 95% alcohol with ~5% water; 200 proof is over 99.5% alcohol with under 0.5% water. Here is how to choose, and which denatured formulas exist at each proof.