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Solvent Red 23

Basic information Safety Supplier Related

Solvent Red 23 Basic information

Product Name:
Solvent Red 23
Synonyms:
  • 1-[[P-(PHENYLAZO)PHENYL]AZO]-2-NAPHTHOL
  • 1-[4-(PHENYLAZO)PHENYLAZO]-2-NAPHTHOL
  • SCARLET B
  • SUDAN 3
  • SUDAN
  • SUDAN RED
  • SUDAN RED BK
  • SUDAN G
CAS:
85-86-9
MF:
C22H16N4O
MW:
352.39
EINECS:
201-638-4
Product Categories:
  • Azo
  • Pharmaceuticals
  • Organics
  • Solvent Dyestuff
  • Aromatics
  • Intermediates & Fine Chemicals
Mol File:
85-86-9.mol
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Solvent Red 23 Chemical Properties

Melting point:
199 °C (dec.)(lit.)
Boiling point:
486.01°C (rough estimate)
Density 
1.2266 (rough estimate)
refractive index 
1.6620 (estimate)
storage temp. 
Store at +5°C to +30°C.
solubility 
Insoluble in water; soluble in benzene, chloroform; moderately soluble in acetone, ether, petroleum ether; slightly soluble in ethanol, xylene
form 
Powder
pka
13.45±0.50(Predicted)
Colour Index 
26100
color 
Red-brown
λmax
507 nm, 354 nm
Merck 
14,8884
BRN 
2016384
Stability:
Stable. Incompatible with strong oxidizing agents.
Biological Applications
Antiseptic; preventing prostate cancer; medical devices; dental impression materials
InChIKey
FHNINJWBTRXEBC-HXEHWPEMSA-N
LogP
5.740 (est)
CAS DataBase Reference
85-86-9(CAS DataBase Reference)
IARC
3 (Vol. 8, Sup 7) 1987
EPA Substance Registry System
C.I. Solvent Red 23 (85-86-9)
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Safety Information

Hazard Codes 
Xi
Risk Statements 
10-20-36/38-36/37/38
Safety Statements 
22-24/25-36-26
WGK Germany 
3
RTECS 
QK4250000
TSCA 
Yes
HS Code 
32129000
Toxicity
cyt-ham:ovr 20 mmol/L/5H-C ENMUDM 1,27,79

MSDS

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Solvent Red 23 Usage And Synthesis

Description

Solvent Red 23 is an oil-soluble red azo dye used in cosmetic products in Japan. Cases were reported in hairdressers, who also reacted to PPD and to paminoazobenzene. One case of contact dermatitis was reported in the metal industry.

Chemical Properties

reddish brown powder

Uses

Weakly acidic azo dye. Biological stain. Dyes and metabolites, Environmental Testing.

Preparation

4-(Phenyldiazenyl)benzenamine diazotization, and Naphthalen-2-ol coupling. Note: some goods by 4-(Phenyldiazenyl)benzenamine and 2-Methyl-4-(o-tolyldiazenyl)benzenamine mixture as diazo components and have to.

Definition

ChEBI: A bis(azo) compound that is 2-naphthol substituted at position 1 by a 4-{[(2-methylphenyl)diazenyl]phenyl}diazenyl group. A fat-soluble dye predominantly used for demonstrating triglycerides in frozen sections, but which may also stain some protein bound l pids in paraffin sections.

Contact allergens

Solvent Red 23 is an oil-soluble red azo-dye used in cosmetic products in Japan. Cases were reported in hairdressers, who also reacted to PPD (the molecule is likely to be hydrolyzed into PPD) and to p-aminoazobenzene. One case of contact dermatitis was reported in the metal industry.

Safety Profile

Poison by intraperitoneal route. Moderately toxic by subcutaneous and intrapleural routes. Questionable carcinogen. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx.

Purification Methods

Crystallise the dye from EtOH, EtOH/water or *benzene/absolute EtOH (1:1). [Beilstein 16 II 75, 16 III 148, 16 IV 248.]

Properties and Applications

yellow red to red. Soluble in ethanol and acetone, soluble in benzene. In concentrated sulfuric acid to blue light green, dilution for blue solution, and a red precipitation.

Standard Light Fastness Heat-resistant(℃) water Sodium Carbonate(5%) Hydrochloric acid(5%)
Melting point Stable
ISO Good 195 70≥ 120

Sublimation

Insoluble No change No change

Solvent Red 23Supplier

J & K SCIENTIFIC LTD.
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