Agent Name

Trypan blue

CAS Number




Major Category



Amanil Sky Blue R; Azidinblau 3B; Azidine Blue 3B; Azurro diretto 3B; Bencidal Blue 3B; Benzaminblau 3B; Benzamine Blue; Benzamine Blue 3B; Benzanil Blue 3BN; Benzanil Blue R; Benzo Blue; Benzo Blue 3B; Benzo Blue 3BS; Benzoblau 3B; Bleu diamine; Bleu diazole N 3B; Bleu directe 3B; Bleu trypane N; Bleue diretto 3B; Blue 3B; Blue EMB; Brasilamina Blue 3B; Brasilazina Blue 3B; C.I. 23850; C.I. Direct Blue 14; C.I. Direct Blue 14, tetrasodium salt; Centraline Blue 3B; Chloramiblau 3B; Chloramine Blue; Chloramine Blue 3B; Chlorazol Blue 3B; Chrome Leather Blue 3B; Congo Blue; Congoblau 3B; Cresotine Blue 3B; Diaminblau 3B; Diamine Blue 3B; Diamineblue; Diaminine Blue; Dianil Blue; Dianil Blue H3G; Dianilblau; Dianilblau H3G; Diaphtamine Blue TH; Diazine Blue 3B; Diazol Blue 3B; Diphenyl Blue 3B; Direct Blue 14; Direct Blue 3B; Direct Blue 3BX; Direct Blue D3B; Direct Blue H3G; Direct Blue M3B; Directakol Blue 3BL; Directblau 3B; Hispamin Blue 3BX; Modr Prima 14 [Czech]; Modr Trypanova [Czech]; Naphthaminblau 3BX; Naphthamine Blue 3BX; Naphthylamine Blue; Niagara Blue; Niagara Blue 3B; Orion Blue 3B; Paramine Blue 3B; Parkibleu; Parkipan; Pontamine Blue 3BX; Pyrazol Blue 3B; Pyrotropblau; Renolblau 3B; Sodium ditolyl-diazobis-8-amino-1-naphthol-3,6-disulfonate; Sodium ditolyldisazobis-8-amino-1-naphthol-3,6-disulfonate; Sodium ditolyldisazobis-8-amino-1-naphthol-3,6-disulphonate; Trianol Direct Blue 3B; Triazolblau 3BX; Tripan Blue; Trypan (Congo) Blue; Trypan Blue; Trypan Blue BPC; Trypanblau [German]; Trypane Blue; Vision Blue; VisionBlue; 2,7-Naphthalenedisulfonic acid, 3,3'-((3,3'-dimethyl(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(5-amino-4-hydroxy-,; tetrasodium salt; [ChemIDplus]


Benzidine Dyes


Gray-blue to blue powder; [CAMEO]


"An Azo that that is used in protozoal infections." [ChemIDplus] An azo dye used in biology and medicine for vital staining of cytoplasm; Also used to stain the eye in ophthalmological practice; [Ullmann]


A skin irritant; Azo compounds such as trypan blue can detonate, especially if sensitized by adding metal salts or strong acids. [CAMEO] Carcinogenic in rats after subcutaneous or intraperitoneal injection; No human data was available. [IARC]

Exposure Assessment
Explanatory Notes

mp = >572 deg F; [CAMEO]

Adverse Effects
IARC Carcinogen

Possible Carcinogen

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Toxicity Information


Chemical Information

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