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Denatonium Benzoate

Definition

Bittering agent (Bitrex), one of the bitterest known compounds, detectable by taste at the parts-per-billion level. Added at very low concentrations to denatured spirits to make accidental ingestion intolerable.

Trade name
Bitrex
Detection threshold
Parts per billion by taste
Purpose
Deter accidental ingestion of denatured spirit

Common questions

Why is denatonium benzoate added at such low concentrations?+

Because it is one of the bitterest known compounds, only a tiny amount is needed to make the taste intolerable, so manufacturers add just enough to deter drinking without materially affecting the spirit's other properties.

Does denatonium benzoate itself make methanol-adulterated liquor safer?+

No, it only discourages someone from swallowing enough to notice the taste; it does not reduce the toxicity of methanol or other denaturants already present if the liquor is consumed anyway.

Related terms

Chromotropic Acid Test
Confirmatory colour test for formaldehyde (and hence indirectly for methanol). Chromotropic acid (4,5-dihydroxy-2,7-naphthalenedisulphonic acid) plus concentrated sulphuric acid plus formaldehyde gives an...
Denaturant
A chemical added to industrial ethanol to make it unfit for human consumption (and therefore exempt from beverage-alcohol excise). Indian Standards list...
Fomepizole
4-methylpyrazole. A competitive inhibitor of alcohol dehydrogenase used as the first-line antidote for methanol poisoning. Ethanol (oral or IV) is the older,...
Formic Acid
HCOOH. The toxic terminal metabolite of methanol, produced after alcohol dehydrogenase converts methanol to formaldehyde and aldehyde dehydrogenase oxidises formaldehyde to formate....
Headspace GC-FID
Gas chromatography with flame-ionisation detection run on the vapour above a sealed sample. The standard forensic method for methanol and ethanol in...
Hooch
Illicit, unregulated country liquor. Indian regional names include haatch, desi tharra, and santhi. Typically distilled from molasses, jaggery, or fermented fruit, with...
Methanol
Methyl alcohol, CH3OH. Boiling point 64.7°C. Found in wood spirit, windshield-washer fluid, and as a deliberate adulterant in illicit liquor. Toxic via...

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