ChemicalBook Product Catalog Organic Chemistry Amides Sulfonic acids amino compound 2-Naphthylamine-5,7-disulfonic acid

2-Naphthylamine-5,7-disulfonic acid

2-Naphthylamine-5,7-disulfonic acid Basic information
Product Name:2-Naphthylamine-5,7-disulfonic acid
Synonyms:2-naftylamin-5,7-disulfonansodny;2-Naphthylamine-5,7-disulfonicaacid;6-amino-1,3-naphthalenedisulfonic;6-amino-3-naphthalenedisulfonicacid;6-aminonaphthalene-1,3-disulphonicacid;6-amino-naphthalene-3-disulfonicacid;amino-iacid;kyselinaamino-i
CAS:118-33-2
MF:C10H9NO6S2
MW:303.31
EINECS:204-246-1
Product Categories:Anilines, Aromatic Amines and Nitro Compounds;Organic acids;Intermediates of Dyes and Pigments
Mol File:118-33-2.mol
2-Naphthylamine-5,7-disulfonic acid Structure
2-Naphthylamine-5,7-disulfonic acid Chemical Properties
Boiling point 568.34℃[at 101 325 Pa]
density 1.769±0.06 g/cm3(Predicted)
vapor pressure 0Pa at 25℃
pka-0.91±0.40(Predicted)
Water Solubility 229g/L at 15℃
LogP-1.85
CAS DataBase Reference118-33-2(CAS DataBase Reference)
EPA Substance Registry System1,3-Naphthalenedisulfonic acid, 6-amino- (118-33-2)
Safety Information
RIDADR 1759
HazardClass 8
PackingGroup III
Toxicityrat,LD50,oral,2gm/kg (2000mg/kg),"Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 1059, 1986.
MSDS Information
2-Naphthylamine-5,7-disulfonic acid Usage And Synthesis
Chemical PropertiesWhite glossy long prismatic needle-like crystals, the crystals precipitated from water contain 5 molecules of crystal water. The solubility in water at 20°C is 23%. Its monosodium salt and monopotassium salt are commonly used in industry, both of which are soluble in water, and the salt solution has green fluorescence.
Uses2-Naphthylamine-5,7-disulfonic acid is an intermediate for the preparation of J acid, bis-J acid, phenyl J acid and scarlet acid.
HazardSkin - Rabbit 2 mg/24h severe; Eye - Rabbit 0.75 mg/24h severe
Flammability and ExplosibilityNotclassified
Synthesis2-Naphthylamine-5,7-disulfonic acid can be obtained by hydrolysis of 2-naphthylamine-1,5,7-trisulfonic acid. Add sulfuric acid, sodium sulfate and 2-naphthylamine-1,5,7-trisulfonic acid into water, keep warm at 110-120°C for 4 hours, cool and filter, and wash in sodium sulfate solution to obtain the product.
2-Naphthylamine-5,7-disulfonic acid Preparation Products And Raw materials
Raw materials2-Naphthylamine
Preparation Products2-Amino-5-hydroxynaphthalene-1,7-disulfonic acid-->C.I. Direct red 42
Nickel bis(sulphamidate) Direct Blue 53 Sulfanilic acid 2,4-Xylenesulfonic acid Sulfamic acid monosodium salt 4-Amino-benzenesulfonic acid monosodium salt Sodium xylenesulfonate Sodium diphenylamine-4-sulfonate 6-Aminocaproic acid Glycine Dihydroergotoxine mesylate Sulfamic acid Dioctyl sulfosuccinate sodium salt Dinonylnaphthalenesulfonic acid 2-NAPHTHYLAMINE-5,7-DISULFONIC ACID DISODIUM SALT 1-Naphthylamine 2-Naphthylamine-5,7-disulfonic acid POLYVINYL CHLORIDE, AMINATED
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