CheckVegan

Is Solvent Red 23 vegetarian?

Solvent Red 23

Vegetarian Vegetarian
Vegan Vegan

Sudan III is a lysochrome diazo dye structurally related to azobenzene. It is a synthetic fat-soluble dye commonly used in histology for staining lipids and in laboratory diagnostics. It is produced entirely from synthetic precursors.

Also known as 1-((4-Phenylazo)phenylazo)-2-naphthol, 1-(4-(Phenylazo)phenylazo)-2-naphthol, Solvent Red 23, Sudan Red BK
INCI name Solvent Red 23
CAS number 85-86-9
EC number 201-638-4
CI number CI 26100
CosIng ID 38153
Last reviewed 3 July 2026

An ingredient is considered vegetarian if it avoids components derived from killing an animal.

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