98% , 117-62-4

CAS NO.：117-62-4

Empirical Formula: C10H9NO6S2

Molecular Weight: 303.31

MDL number: MFCD00021512

EINECS: 204-201-6

PRODUCT Properties

• Boiling point: 205.8°C (rough estimate)
• Density: 1.6329 (rough estimate)
• refractive index: 1.7330 (estimate)
• storage temp.: 2-8°C
• pka: -0.51±0.40(Predicted)
• Water Solubility: soluble
• InChI: InChI=1S/C10H9NO6S2/c11-8-5-4-6-7(10(8)19(15,16)17)2-1-3-9(6)18(12,13)14/h1-5H,11H2,(H,12,13,14)(H,15,16,17)
• InChIKey: YAIKCRUPEVOINQ-UHFFFAOYSA-N
• SMILES: C1(S(O)(=O)=O)=C2C(C(S(O)(=O)=O)=CC=C2)=CC=C1N
• LogP: -1.85
• CAS DataBase Reference: 117-62-4(CAS DataBase Reference)
• EPA Substance Registry System: 1,5-Naphthalenedisulfonic acid, 2-amino- (117-62-4)

Description and Uses

2-Aminonaphthalene-1,5-disulfonic acid [117-62-4]. 5-sulfo-Tobias acid, C10H9NO6S2, Mr 303.32, is purified by crystallization of the dipotassium salt from water. Alkali fusion results in formation of 2-amino-5-hydroxynaphthalene-1-sulfonic acid. Sulfonation (40 % oleum, 100℃) gives 2-aminonaphthalene-1,5,7-trisulfonic acid. Heating with aqueous sulfuric acid produces 2-aminonaphthalene-5- sulfonic acid. The diazo compound is converted to 2-diazo-1-hydroxynaphthalene-5-sulfonic acid on treatment with alkaline hypochlorite.

As a diazo component in orange and red azo reactive dyes, 2-Amino-1,5-naphthalenedisulfonic acid gives more bathochromic shades than Tobias acid.

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H319
• Precautionary statements: P305+P351+P338
• Hazard Codes: Xi,C
• Risk Statements: 36-34
• Safety Statements: 26-28A
• RIDADR: 1759
• WGK Germany: 2
• RTECS: QJ6135000
• F: 8-10
• TSCA: TSCA listed
• HazardClass: 8
• PackingGroup: III
• Toxicity: LD50 oral in rat: 5430mg/kg
• REACH Registrations: Active