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Home/Compounds/Dye & Pigment/Oil Red O
C26H24N4O
408.5 g/mol
Dye & Pigment

1-(2-(4-(2-(2,5-Dimethylphenyl)diazenyl)-2,5-dimethylphenyl)diazenyl)-2-naphthalenol

CAS1320-06-5EC238-209-6
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
Histological dye for triglycerides

Oil red O is a fat-soluble bis(azo) dye, specifically a 2-naphthol derivative substituted with arylazo groups. It is predominantly used as a histological dye for demonstrating triglycerides in frozen tissue sections and for staining protein-bound lipids in paraffin sections.

Histological dye for triglycerides in frozen sectionsStaining of protein-bound lipids in paraffin sections

Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.

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Related Compounds

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Identifiers
IUPAC Name

1-[[4-[(2,5-dimethylphenyl)diazenyl]-2,5-dimethylphenyl]diazenyl]naphthalen-2-ol

InChIKey

NPGIHFRTRXVWOY-UHFFFAOYSA-N

SMILES

CC1=CC(=C(C=C1)C)N=NC2=C(C=C(C(=C2)C)N=NC3=C(C=CC4=CC=CC=C43)O)C

Synonyms (14)
  • Solvent Red 27
  • Sudan Red 5B

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