Agent Name

Scarlet red

CAS Number




Major Category



2-Naphthalenol, 1-((2-methyl-4-((2-methylphenyl)azo)phenyl)azo)-; CI 26105; Solvent Red 24; 1-((2-Methyl-4-((2-methylphenyl)azo)phenyl)azo)-2-naphthalenol; 1-(4-(o-Tolylazo)-o-tolylazo)-2-naphthol; 1-(4-o-Tolylazo-o-tolylazo)-2-naphthol; 2',3-Dimethyl-4-(2-hydroxynaphthylazo)azobenzene; 2-Naphthol, 1-((4-(o-tolylazo)-o-tolyl)azo)-; Biebrich Scarlet BPC; Biebrich Scarlet R medicinal; Biebrich Scarlet Red; Brasilazina Oil Red B; C.I. 258; C.I. 26105; C.I. Solvent Red 24; Calco Oil Red D; Candle Scarlet 2B; Candle Scarlet B; Candle Scarlet G; Ceres Red BB; Cerotine Ponceau 3B; Cerven rozpoustedlova 24 [Czech]; Dispersol Red PP; Enial Red IV; Fast Oil Red B; Fast Red BB; Fat Ponceau R; Fat Red 2B; Fat Red B; Fat Red BB; Fat Red BS; Fat Red TS; Fat Soluble Dark Red; Grasal Brilliant Red B; Grasan Brilliant Red B; Hidaco Oil Red; Lacquer Red V; Lacquer Red VS; Lipid Crimson; Oil Red 282; Oil Red 2B; Oil Red 3; Oil Red 3B; Oil Red 47; Oil Red 4B; Oil Red 7; Oil Red A; Oil Red APT; Oil Red BB; Oil Red BS; Oil Red D; Oil Red ED; Oil Red F; Oil Red GO; Oil Red IV; Oil Red PEL; Oil Red RC; Oil Red RR; Oil Red S; Oil Red TAX; Oil Red ZD; Oil Scarlet; Oil Scarlet 48; Oil Soluble Dark Red; Oleal Red BB; Organol Red B; Orient Oil Red RR; Phenoplaste Organol Red B; Plastoresin Red F; Red 3R Soluble in Grease; Resinol Red 2B; Resoform Red G; Rubrum scarlatinum; Sarlach R [Czech]; Scarlet R (michaelis); Scarlet Red; Scarlet oil; Scarlet red, biebrich; Scharlachrot; Schultz No. 541; Silotras Red T3B; Somalia Red IV; Stearix Red 4B; Stearix Red 4S; Sudan IV; Sudan P; Sudan Red 4BA; Sudan Red BB; Sudan Red BBA; Sudan Red IV; Tertrogras Red N; Toyo Oil Red BB; Waxakol Red BL; Waxoline Red O; Waxoline Red OM; Waxoline Red OS; alpha-Tolylazo-o-tolylazo-beta-naphthol; o-Tolueneazo-o-tolueneazo-beta-naphthol; o-Tolylazo-o-tolylazo-2-naphthol; o-Tolylazo-o-tolylazo-beta-naphthol; 1-(2-Methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol; 2-Naphthalenol, 1-(2-(2-methyl-4-(2-(2-methylphenyl)diazenyl)phenyl)diazenyl)-; [ChemIDplus]


Azo Dyes


Dark brown solid; [Merck Index] Dark red powder; [Aldrich MSDS]


Permitted for use as an inert ingredient in non-food pesticide products; [EPA] Used as a fat stain; Has been used in human and veterinary medicine to promote wound healing; [Merck Index]


A skin and strong eye irritant; [Aldrich MSDS]

Adverse Effects
IARC Carcinogen

Not Classifiable

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