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Basic Blue 26 Chemical Structure

Home » Speciality Dyes and Biological Stains » Basic Blue 26

What is Basic Blue 26/ Victoria Blue B?

Basic Blue 26 also commonly referred to as Victoria Blue B, is a cationic dye that is very dark violet in color and belongs to the category of triphenylmethane dyes. It is an iminium salt and an organic chloride salt.

Macsen Laboratories is the leading manufacturer and supplier of Basic Blue 26 with ISO certification.
Name of Product Basic Blue 26
IUPAC Name [4-[bis[4-(dimethylamino)phenyl]methylidene]naphthalen-1-ylidene]-phenylazanium;chloride
Synonyms Victoria blue B; Calcozine Blue B; Victoria Pure Blue B; Tertrophene Blue; Hecto Blue B; Aizen Victoria Blue B Base; Azul Básico 26; Bleu de base 26
CAS No 2580-56-5
Molecular Formula C33H32ClN3
Molecular Weight 506.1 g/mol
Color Index No 44045
Pubchem CID 17407
Pubchem SID 475523903


SR. No Criteria Limit/Specification
1 Appearance (Form) Solid Powder
2 Appearance (Color) Dark Blue to Dark Purple
3 Solubility Soluble in Water, Alcohol, DMSO (slightly)
4 Solubility (Color) Blue to Very Dark Blue
5 Melting Point 206 °C (decomposition)
6 Storage Room Temperature


  • Many countries have granted permission for the dye to be used in the cosmetics industry (used in hair dyes) as well as the food industry.
  • It is used in in the dying of silk and wool.
  • In addition, it is utilized in the shading of bamboo, wood, printing paper, and regular paper.
  • It is also used as a component in the production of organic pigments as well as other solvent dyes.

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