Agent Name

C.I. Pigment Red 3

Alternative Name

Toluidine Red

CAS Number




Major Category



Toluidine Red; ((4-Methyl-2-nitrophenyl)azo)-2-naphthol; 1-((2-Nitro-4-methylphenyl)azo)-2-naphthol; 1-((4-Methyl-2-nitrophenyl)azo)-2-naphthalenol; 1-(4-Methyl-2-nitrophenylazo)-2-naphthol; 1-(o-Nitro-p-tolylazo)-2-naphthol; 2-Naphthalenol, 1-((4-methyl-2-nitrophenyl)azo)-; Accosperse Toluidine Red XL; Adc Toluidine Red B; Atlasol Spirit Red 3; Basoflex Red 361; C.I. 12120; C.I.12120; C.I.pigment Red 3; C.P. Toluidine Toner A-2989; C.P. Toluidine Toner A-2990; C.P. Toluidine Toner Dark RS-3340; C.P. Toluidine Toner Deep X-1865; C.P. Toluidine Toner Light RS-3140; C.P. Toluidine Toner RT-6101; C.P. Toluidine Toner RT-6104; C.P.Toluidine Toner A-2989; C.P.Toluidine Toner A-2990; CI 12120; CI Pigment Red 3; CP Toluidine toner A-2989; Calcotone Toluidine Red YP; Carnelio Helio Red; Cerven pigment 3 [Czech]; Chromatex Red J; D and C Red No. 35; Dainichi Permanent Red 4 R; Deep Fastona Red; Duplex Toluidine Red L 20-3140; Eljon Fast Scarlet PV Extra; Eljon Fast Scarlet RN; Enialit Light Red RL; Fast Red A (VAN); Fast Red A (pigment); Fast Red AB; Fast Red J; Fast Red JE; Fast Red R; Fastona Red B; Fastona Scarlet RL; Fastona Scarlet YS; Graphtol Red A-4RL; Hansa Red B; Hansa Red G; Hansa Scarlet RB; Hansa Scarlet RN; Hansa Scarlet RNC; Helio Fast Red BN; Helio Fast Red RL; Helio Fast Red RN; Helio Red RL; Helio Red Toner; Hispalit Fast Scarlet RN; Independence Red; Irgalite Fast Red P4R; Irgalite Fast Scarlet RND; Irgalite Red PV2; Irgalite Red RNPX; Irgalite Scarlet RB; Isol Fast Red HB; Isol Fast Red RN2B; Isol Fast Red RN2G; Isol Fast Red RNB; Isol Fast Red RNG; Isol Toluidine Red HB; Isol Toluidine Red RN2B; Isol Toluidine Red RN2G; Isol Toluidine Red RNB; Isol Toluidine Red RNG; Kromon Helio Fast Red; Kromon Helio Fast Red YS; Lake Red 4R; Lake Red 4RII; Lithol Fast Scarlet RN; Lutetia Fast Red 3R; Lutetia Fast Scarlet RF; Lutetia Fast Scarlet RJN; Monolite Fast Scarlet CA; Monolite Fast Scarlet GSA; Monolite Fast Scarlet RB; Monolite Fast Scarlet RBA; Monolite Fast Scarlet RN; Monolite Fast Scarlet RNA; Monolite Fast Scarlet RNV; Monolite Fast Scarlet RT; No. 2 Forthfast Scarlet; Oralith Red P4R; Permanent Red 4R; Pigment Red 3; Pigment Red RL; Pigment Ruby; Pigment Scarlet; Pigment Scarlet B; Pigment Scarlet N; Pigment Scarlet R; Pigment Scarlet [Russian]; Polymo Red FGN; Recolite Fast Red BL; Recolite Fast Red RBL; Recolite Fast Red RL; Recolite Fast Red RYL; Sanyo Scarlet Pure; Sanyo Scarlet Pure No. 1000; Scarlet Pigment RN; Segnale Light Red 2B; Segnale Light Red B; Segnale Light Red BR; Segnale Light Red C4R; Segnale Light Red RL; Siegle Red 1; Siegle Red B; Siegle Red BB; Silogomma Red RLL; Silosol Red RBN; Silosol Red RN; Siloton Red BRLL; Siloton Red RLL; Symuler Fast Scarlet 4R; Syton Fast Scarlet RB; Syton Fast Scarlet RD; Syton Fast Scarlet RN; Tertropigment Red HAB; Tertropigment Scarlet LRN; Toluidine Red; Toluidine Red 10451; Toluidine Red 3B; Toluidine Red 4R; Toluidine Red BFB; Toluidine Red BFGG; Toluidine Red D 28-3930; Toluidine Red Light; Toluidine Red M 20-3785; Toluidine Red R; Toluidine Red RT-115; Toluidine Red Toner; Toluidine Red XL 20-3050; Toluidine Toner; Toluidine Toner L 20-3300; [ChemIDplus]


Azo Dyes


Yellowish-red to red solid; [CAMEO]


Used in paints, inks, plastics, rubber, cement, textile printing, and munitions; [HSDB]


Stains skin; May be absorbed through the skin; [CAMEO] An irritant; May cause serious injury to eyes; Possible sensitizer; Injury to adrenal glands, thyroid, spleen, liver, bone marrow, and kidneys in high-dose animal experiments; [MSDSonline]

Adverse Effects

Hepatotoxin, Secondary

IARC Carcinogen

Not Classifiable

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Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information


Chemical Information

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Related Information in HazMap

Industrial Processes with risk of exposure: