2-Aminonaphthalene-1-sulfonic acid 81-16-3

Details:

2-Aminonaphthalene-1-sulfonic acid Basic information
Product Name: 2-Aminonaphthalene-1-sulfonic acid
Synonyms: 2-amino-1-naphthalenesulfonate;Kyselina 2-naftylamin-1-sulfonova;Kyselina tobiasova;kyselina2-naftylamin-1-sulfonova;kyselina2-naftylamin-1-sulfonova(czech);kyselinatobiasova;kyselinatobiasova(czech);NaphthylaMine-1-sulfonic
CAS: 81-16-3
MF: C10H9NO3S
MW: 223.25
EINECS: 201-331-5
Product Categories: Intermediates of Dyes and Pigments;Intermediates;Organics
Mol File: 81-16-3.mol
2-Aminonaphthalene-1-sulfonic acid Structure
2-Aminonaphthalene-1-sulfonic acid Chemical Properties
Melting point  180 °C
Boiling point  220°C (rough estimate)
density  1.3588 (rough estimate)
refractive index  1.5250 (estimate)
pka pK1: 2.35 (25°C)
Water Solubility  4.083g/L(20 ºC)
Merck  14,6406
BRN  613084
CAS DataBase Reference 81-16-3(CAS DataBase Reference)
NIST Chemistry Reference 2-Naphthylamine-1-sulfonic acid(81-16-3)
EPA Substance Registry System 2-Amino-1-naphthalenesulfonic acid (81-16-3)
Safety Information
Risk Statements  36/37/38-40
Safety Statements  26-36/37/39
RIDADR  2585
WGK Germany  1
RTECS  QK1250000
TSCA  Yes
HazardClass  8
PackingGroup  III
Hazardous Substances Data 81-16-3(Hazardous Substances Data)

2-Aminonaphthalene-1-sulfonic acid Usage And Synthesis
Chemical Properties Grey white to light pink powder
Uses Azo dye intermediate, optical brighteners.
Purification Methods Crystallise the acid under nitrogen from boiling water and dry it in a steam oven [Bryson Trans Faraday Soc 47 522, 527 1951]. [Beilstein 14 III 2240, 14 IV 2792.]
2-Aminonaphthalene-1-sulfonic acid Preparation Products And Raw materials
Preparation Products J acid-->Lithol Red-->sodium 2-[(2-hydroxynaphthyl)azo]naphthalenesulphonate -->3-Hydroxy-N-2-naphthyl-2-naphthamide-->ReactivebrilliantredKE-7B -->disodium 2-[[1-(2,5-dichloro-4-sulphonatophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]naphthalene-1-sulphonate -->REACTIVE RED 195-->2-Amino-1,5-naphthalenedisulfonic acid
Raw materials Sodium hydroxide-->Hydrochloric acid-->Sulfuric acid -->Ammonia-->Chlorosulfonic acid-->Sulfur dioxide-->2-Naphthol-->2-Ethylnitrobenzene