Metanil Yellow (Acid Yellow 36) from Research-Lab Fine Chem industries is an analytical grade reagent. It is azo class dye. It is used as a pH indicator in analytical chemistry and it changes color from red at pH1.2 to yellow at pH 2.3. It is widely used as a food adulterant in turmeric due to its bright yellow color. It is reported to be neurotoxic and hepatotoxic based on animal studies. Quantity Provided: 100 gm/Bottle Molecular Weight: 375.38 Molecular Formula: C18H14N3NaO3S CAS No: 587-98-4 Dye content: Min. 70%