8-Amino-1-naphthalenesulfonic Acid , ≥98.0%(HPLC) , 82-75-7

CAS NO.：82-75-7

Empirical Formula: C10H9NO3S

Molecular Weight: 223.25

MDL number: MFCD00035730

EINECS: 201-437-1

PRODUCT Properties

• Melting point: >350°C
• Boiling point: 220°C (rough estimate)
• Density: 1.3588 (rough estimate)
• refractive index: 1.6500 (estimate)
• pka: pK1: 5.03 (25°C)
• form: powder to crystal
• color: Light yellow to Brown
• Water Solubility: 0.2g/L(21 ºC)
• Merck: 14,6405
• BRN: 983230
• InChI: InChI=1S/C10H9NO3S/c11-8-5-1-3-7-4-2-6-9(10(7)8)15(12,13)14/h1-6H,11H2,(H,12,13,14)
• InChIKey: CYJJLCDCWVZEDZ-UHFFFAOYSA-N
• SMILES: C1(S(O)(=O)=O)=C2C(C=CC=C2N)=CC=C1
• CAS DataBase Reference: 82-75-7(CAS DataBase Reference)
• EPA Substance Registry System: 1-Naphthalenesulfonic acid, 8-amino- (82-75-7)

Description and Uses

Intermediate of dyestuff. Dehydration with phosphorus oxychloride yields naphthosultam, and diazotization followed by hydrolysis results in naphthosultone, the intermediate for 1- hydroxynaphthalene-8-sulfonic acid. Diazotization followed by a Sandmeyer cyanide reaction gives 8-cyanonaphthalene-1-sulfonic acid, one of the most industrially important Sandmeyer reaction products because the nitrile forms the lactam, naphthostyril [130-00-7], upon treatment with concentrated alkali at 185℃. Hydrolysis of naphthostyril with dilute alkali yields 8-aminonaphthalene-1-carboxylic acid, which is the key intermediate for production of anthanthrone vat dyes via 1,10 -binaphthyl8,80 -dicarboxylic acid.

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H335-H315-H319
• Precautionary statements: P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P261-P280a-P304+P340-P305+P351+P338-P405-P501a
• Hazard Codes: C
• Risk Statements: 34
• Safety Statements: 26-27-36-45
• TSCA: Yes
• HS Code: 29214500