SOLVENT RED 27

PRODUCT IDENTIFICATION
CAS NO.

1320-06-5

SOLVENT RED 27
EINECS NO. 215-295-3
FORMULA C26H24N4O
MOL WT. 408.49
H.S. CODE 3204.90.0000
TOXICITY  
CLASSIFICATION

Coloring Agent, Azo dye, Sudan Stain, Solvent dye

SYNONYMS C.I. Solvent Red 27; C.I. 26125;
1-((4-((Dimethylphenyl)azo)dimethylphenyl)azo)-2-naphthalenol; Oil Red O; 1-(2-(4-(2-(Dimethylphenyl)diazenyl)dimethylphenyl)diazenyl)- 2-naphthalenol;

SMILES

c1(c(ccc2ccccc12)O)\N=N\c1c(c(c(cc1)\N=N\c1c(c(ccc1)C) C)C)C

EXTRA NOTES

Oil Red O largely replaced Sudan III and Sudan IV, as it provides much deeper red color and the stains are therefore much easier to see.
Other RN: 8004-57-7, 29063-38-5, 50926-91-5, 59459-22-2, 86003-57-8

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

dark red powder

MELTING POINT 105 - 120 C (decomposes)
BOILING POINT  
SPECIFIC GRAVITY

 

SOLUBILITY IN WATER Insoluble
AUTOIGNITION

 

pH  
VAPOR DENSITY  
NFPA RATINGS  
FLASH POINT

 

STABILITY Stable under ordinary conditions.

EXTERNAL LINKS & GENERAL DESCRIPTION

USA.gov - Oil Red O

Wikipedia Linking - Oil Red O

Google Scholar Search - Oil Red O

Drug Information Portal (U.S. National Library of Medicine) - Oil Red O

PubChem Compound Summary - Oil Red O

KEGG (Kyoto Encyclopedia of Genes and Genomes) -  Oil Red O

http://www.ncbi.nlm.nih.gov/ -  Oil Red O

Material Safety Data Sheet - Oil Red O

EPA - Substance Registry Services - Oil Red O

http://stainsfile.info/ - Oil Red O

Local:
Oil red O (C.I. Solvent Red 27) is a fat-soluble diazo dye used to identify low-taxed or high sulfur fuels. C.I. Solvent Red 164 and Oil red OB (C.I.Solvent Red 26) are similar products for application.

  • Oil red O (CAS RN: 1320-06-5): 1-((4-((Dimethylphenyl)azo)dimethylphenyl)azo)-2-naphthol
  • Oil Red OB (CAS RN: 4477-79-6): 1-((2,5-Dimethyl-4-((2-methylphenyl)azo)phenyl)azo)-2-naphthol
  • Solvent Red 164 (CAS RN: 71819-51-7; 92257-31-3): a mixture of isomers that are similar to Solvent Red 26 with more aromatic and aliphatic branches to increase solubility in fuels.

Oil Red O is also used as a composition of colored smokes, to dye plastics and as a lipid/lipoprotein staining.

SALES SPECIFICATION

APPEARANCE

dark red powder

STRENGTH

100%

MELTING POINT

 105 - 120 C

PARTICLE SIZE

1% max ( 80 mesh)

ASH

0.4% max

TRANSPORTATION
PACKING  
HAZARD CLASS  
UN NO.  
SAFETY INFORMATION

HAZARD OVERVIEW

Not a dangerous substance or mixture according to GHS (Globally Harmonised System). Eyes: May cause eye irritation. Skin: May be harmful if absorbed through skin. May cause skin irritation. Inhalation: May be harmful if inhaled. May cause respiratory tract irritation. Ingestion: May be harmful if swallowed. 

HAZARD CODES

 

RISK PHRASES

36

SAFETY PHRASES

24