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 intense violet colour.

Explained in

Analysis of Methanol, Denaturants and Illicit Liquors

Your journey to becoming a forensic professional starts here.

Practice with mock tests, learn from structured notes, and get your questions answered by a global forensic community, all in one place.

Continue learning Create Your Account

Chromotropic acid test

Explained in

Related terms

Your journey to becoming a forensic professional starts here.