[¦krō·mə¦träp·ik ′as·əd] (organic chemistry) C10H8O8S2 White, needlelike crystals that are soluble in water; used as an analytical reagent and azo dye intermediate.
chromotropic acid
chro·mo·tro·pic ac·id
(krō'mō-trop'ik as'id), Used as a reagent and in chromotropes.