1-Naphthylamine-7-sulfonic acid

CAS No.：119-28-8

Other grades of this product :

1-Naphthylamine-7-sulfonic acid Basic information

Synthesis

Product Name:	1-Naphthylamine-7-sulfonic acid
Synonyms:	TIMTEC-BB SBB000621;SODIUM NAPTHIONATE;SODIUM NAPHTHIONATE;SODIUM 1-NAPHTHYLAMINE-4-SULFONATE;PARA-NAPHTHIONIC ACID, NA SALT;NAPHTHIONIC ACID SODIUM SALT 0.5-WATER;NAPHTHIONIC ACID SODIUM SALT;NAPHTHYLAMINE-4-SULFONIC ACID SODIUM SALT
CAS:	119-28-8
MF:	C10H9NO3S
MW:	223.25
EINECS:	204-311-4
Product Categories:	Intermediates of Dyes and Pigments;Intermediates
Mol File:	119-28-8.mol

1-Naphthylamine-7-sulfonic acid Chemical Properties

Melting point	≥300 °C(lit.)
Boiling point	220°C (rough estimate)
density	1.3588 (rough estimate)
refractive index	1.6500 (estimate)
storage temp.	Sealed in dry,Room Temperature
form	Powder
pka	pK1: 3.66 (25°C)
Merck	14,2351
BRN	2115629
InChIKey	QEZZCWMQXHXAFG-UHFFFAOYSA-N
CAS DataBase Reference	119-28-8(CAS DataBase Reference)
NIST Chemistry Reference	1-Naphthylamine-7-sulfonic acid(119-28-8)
EPA Substance Registry System	2-Naphthalenesulfonic acid, 8-amino- (119-28-8)

Safety Information

Hazard Codes	C
Risk Statements	34
Safety Statements	26-36/37/39-45
RIDADR	UN 2585 8/PG 3
WGK Germany	2
TSCA	Yes
HazardClass	8
PackingGroup	III
HS Code	29214500

MSDS Information

Provider	Language
SigmaAldrich	English

1-Naphthylamine-7-sulfonic acid Usage And Synthesis

Synthesis	1-Naphthylamine-7-sulfonic acid can be obtained by sulfonation, nitration, neutralization, reduction and acid precipitation of naphthalene.
Chemical Properties	Brown crystalline
Uses	Intermediate of dyestuff
Uses	8-Amino-2-naphthalenesulfonic acid can be used as a reactant to synthesize: Fe₃O₄/sulfonated polyaniline composite material via chemical oxidative polymerization with aniline in the presence of magnetite (Fe₃O₄) nanoparticles. Prismatic crystals of strychnine-8-ammonio-2-naphthalenesulfonate-water by heating with strychnine in water/ethanol solvent mixture. 5-amino-9-dialkylamino benzo[a]phenoxazine dyes (Nile blue analogs) by condensation with N-alkyl or N-sulfo-propyl 4-arylazo-substituted 3-hydroxyaniline.
Application	1-Naphthylamine-7-sulfonic acid can be used as a dye intermediate to prepare dyes such as direct light fast blue B2RL, direct light fast red brown RTL, and sulfur blue CV.

1-Naphthylamine-7-sulfonic acid Preparation Products And Raw materials

Raw materials

Sulfuric acid-->Nitric acid-->Iron-->TITANIUM OXIDE

Preparation Products

Peri acid-->Sulphur Blue CV-->1-Aminonaphthalene-6-sulfonic acid-->Direct Blue 71-->disodium 3-[[4-[[4-amino-6(or 7)-sulphonatonaphthyl]azo]phenyl]azo]-6-[(2,4-diaminophenyl)azo]-4-hydroxynaphthalene-2-sulphonate-->1-Amino-7-naphthol-->ACID ORANGE 51-->C.I. Mordant Brown 90-->1,4-Benzenedisulfonic acid, 2-[[4-[[4-[(2,4-diamino-5-nitrophenyl)azo]-6-sulfo-1-naphthalenyl]azo]-1-naphthalenyl]azo]-, trisodium salt-->tetrasodium 2-[[2-amino-6-[[4-[[4-[(3-carboxylato-4-hydroxyphenyl)azo]-7-sulphonato-1-naphthyl]azo]-2,5-dimethoxyphenyl]azo]-5-hydroxy-7-sulphonato-1-naphthyl]azo]-5-nitrobenzoate-->Direct Black 197-->Direct Black 24-->Direct Blue 82-->Direct Brown 25-->Mordant Brown 36-->C.I. Direct green 21-->DIRECT BLUE 78-->C.I. Direct Brown 150-->C.I. Direct Brown 149-->2-Naphthalenesulfonic acid, 6-[[4-amino-6(or 7)-sulfo-1-naphthalenyl]azo]-3-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-4-hydroxy-, disodium salt

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