2-Amino-8-naphthol-6-sulfonic Acid , 90%, industrial grade , 90-51-7

Synonym(s):
7-Amino-1-naphthol-3-sulfonic acid

CAS NO.：90-51-7

Empirical Formula: C10H9NO4S

Molecular Weight: 239.25

MDL number: MFCD00003973

EINECS: 202-000-8

PRODUCT Properties

• Boiling point: 458℃[at 101 325 Pa]
• Density: 1.4338 (rough estimate)
• vapor pressure: 0Pa at 25℃
• refractive index: 1.6500 (estimate)
• storage temp.: Keep in dark place,Sealed in dry,Room Temperature
• pka: -0.20±0.40(Predicted)
• form: powder to crystal
• color: White to Gray to Brown
• Water Solubility: 4.5g/L(hot water)
• InChIKey: HBZVNWNSRNTWPS-UHFFFAOYSA-N
• LogP: -1.39

Description and Uses

6-Amino-4-hydroxy-2-naphthalenesulfonic Acid is used in the synthesis of mono-azo dyes for application towards synthetic fibers. Also used in the synthesis of dyes with high technical properties for silk. The so-called g acid is an important component in azo dyes; coupling can be carried out under acid or alkaline conditions. The oamino azo configuration obtained under acid conditions leads to high lightfastness of special importance in monoazo acid red dyes for wool and polyamide, such as C.I. Acid Reds 37, 57, and 266.

Safety

• Symbol(GHS): GHS05,GHS07
• Signal word: Danger
• Hazard statements: H315-H319-H314
• Precautionary statements: P280-P305+P351+P338-P310-P264-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313
• Hazard Codes: C
• Risk Statements: 34
• Safety Statements: 26-27-28-36/37/39-45
• RIDADR: UN 2585 8/PG 3
• WGK Germany: 1
• RTECS: QK1295250
• HS Code: 2922.21.5000
• Toxicity: LD50 intraperitoneal in mouse: > 500mg/kg