Toluidine blue O, high purity

Supplier: VWR Chemicals

Synonyms: TBO, 3-Amino-7-(dimethylamino)-2-methyl-5-phenothiazinium chloride, 3-Amino-7-(dimethylamino)-2-methylphenothiazin-5-ium chloride, Tolonium chloride, Basic Blue 17, Blutene chloride

0672-25GEA 374 GBP
0672-25G 0672-50G
Toluidine blue O, high purity
Toluidine blue O

A blue counterstain often used for metachromatic staining of mast cells, cartilage, and acid mucins.


  • Black-grey powder

Formula: C₁₅H₁₆ClN₃S
MW: 305,83 g/mol
Storage Temperature: Ambient
MDL Number: MFCD00011934
CAS Number: 92-31-9
EINECS: 202-146-2
Merck Index: 12,09658

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Specification Test Results

Dye Content >50.0%
Em (626nm, Water)
Loss on Drying ≤8.0%
Color Index 52040

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