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Is Methyl Red vegan?

Methyl Red (2-(N,N-dimethyl-4-aminophenyl)azobenzenecarboxylic acid) is a synthetic azo dye and pH indicator that is red in solutions below pH 4.4, yellow above pH 6.2, and orange in between, with a pKa of 5.1. It is used in analytical chemistry and microbiology (e.g., the methyl red test) and is classified as IARC Group 3 regarding carcinogenicity.

Classifications are made to the best of our knowledge based on available scientific and regulatory sources. We cannot guarantee the accuracy of every entry, errors in the sources we draw from can always occur. This tool also cannot account for cross-contamination, which depends entirely on individual suppliers and producers. If you believe a classification is incorrect, you can report an issue.