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7-hydroxynaphthalene-1-sulphonic acid

7-hydroxynaphthalene-1-sulphonic acid Structure
7-hydroxynaphthalene-1-sulphonic acid structure
CAS No.
132-57-0
Chemical Name:
7-hydroxynaphthalene-1-sulphonic acid
Synonyms
7-Hydroxy-1-naphthalenesulfonic acid;7-hydroxynaphthalene-1-sulfonic acid;7-hydroxynaphthalene-1-sulphonic acid;1-Naphthalenesulfonic acid, 7-hydroxy-
CBNumber:
CB4874948
Molecular Formula:
C10H8O4S
Molecular Weight:
224.23
MDL Number:
MOL File:
132-57-0.mol
Last updated:2023-11-01 14:36:06
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7-hydroxynaphthalene-1-sulphonic acid Properties

Boiling point 335.63°C (rough estimate)
Density 1.4643 (rough estimate)
refractive index 1.5400 (estimate)
pka 0.26±0.40(Predicted)
FDA UNII M1490B3Z3G
EPA Substance Registry System 1-Naphthalenesulfonic acid, 7-hydroxy- (132-57-0)

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
GHS07
Signal word  Warning
Hazard statements  H319-H315
Precautionary statements  P264-P280-P302+P352-P321-P332+P313-P362-P264-P280-P305+P351+P338-P337+P313P

7-hydroxynaphthalene-1-sulphonic acid price

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Usbiological 280166 7-Hydroxynaphthalene-1-sulfonic acid 132-57-0 50mg $1296 2021-12-16 Buy
Product number Packaging Price Buy
280166 50mg $1296 Buy

7-hydroxynaphthalene-1-sulphonic acid Chemical Properties,Uses,Production

Chemical Properties

Colorless crystals. Easily soluble in water and alcohol. 2-Hydroxynaphthalene-8-sulfonic acid [132-57-0]. (7-hydroxynaphthalene-1-sulfonic acid), crocein acid, Bayer’s acid, C10H8O4S, Mr 224.23, is more soluble in water than 2-hydroxynaphthalene-6-sulfonic acid and cannot readily be isolated. Its salts are also more soluble than their 2,6-analogues and are difficult to isolate. On evaporation of its solutions, the free acid (2-Hydroxynaphthalene-8-sulfonic acid) decomposes to 2-naphthol. Coupling with diazo compounds takes place in the 1-position, but reaction is hindered by the peri-sulfonic acid group so that concentrated conditions and sometimes catalysts are required. Above 60 ℃, sulfuric acid converts 2-Hydroxynaphthalene-8-sulfonic acid into 2-hydroxynaphthalene-6-sulfonic acid; sulfonation then proceeds further to give the 6,8-disulfonic acid. Amination (Bucherer reaction) gives 2-aminonaphthalene8-sulfonic acid.

Uses

Used as an intermediate of acid dyes and direct azo dyes.

Preparation

7-hydroxynaphthalene-1-sulphonic acid was prepared by sulfonation of 2-naphthol with 98% sulfuric acid at low temperature.

7-hydroxynaphthalene-1-sulphonic acid Preparation Products And Raw materials

Raw materials

2-NAPHTHOL-8-SULFONIC ACID POTASSIUM SALT 6-Hydroxynaphthalene-2-sulphonic acid

Preparation Products

disodium 7-hydroxy-8-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate 4-Hydroxy-3-[[4'-[(2-hydroxy-8-sodiosulfo-1-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2,5-disulfonic acid disodium salt IRGALAN BORDEAUX EL amanil developed black bhsw 7-Hydroxy-8-[[2-methoxy-4-[(4-sodiosulfophenyl)azo]phenyl]azo]naphthalene-1-sulfonic acid sodium salt
Chloramine Rubine 7-Hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenesulfonic acid disodium salt CROCEIN SCARLET 7B Naphthalenesulfonic acid, 2-hydroxy-1-[[2-methyl-4-[(2-methylphenyl)azo]phenyl]azo]-, monosodium salt Direct Blue 45
disodium 8,8'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(7-hydroxynaphthalene-1-sulphonate)

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7-hydroxynaphthalene-1-sulphonic acid Suppliers

Global( 3)Suppliers
Supplier Tel Email Country ProdList Advantage
Hubei Jusheng Technology Co.,Ltd. 		18871490254 linda@hubeijusheng.com CHINA 28180 58
Supplier Advantage
Hubei Jusheng Technology Co.,Ltd. 		58

132-57-0(7-hydroxynaphthalene-1-sulphonic acid)Related Search:

Dipotassium 7-hydroxynaphthalene-1,3-disulphonate 2-NAPHTHOL-8-SULFONIC ACID POTASSIUM SALT disodium 7-hydroxy-8-[[4'-[[4-[[(p-tolyl)sulphonyl]oxy]phenyl]azo][1,1'-biphenyl]-4-yl]azo]naphthalene-1,3-disulphonate ACID RED 114 PONCEAU 6R
2-Naphthol-6,8-disulfonic acid CROCEIN SCARLET 7B Acid Red 18 DIRECT SCARLET B CRYSTAL PONCEAU 6R
Acid Red 73 DIRECT FAST RED 3B Acid Orange 10 disodium 8-[[3,3'-dimethoxy-4'-[[4-[[(p-tolyl)sulphonyl]oxy]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-7-hydroxynaphthalene-1,3-disulphonate 2,NAPHTHOL-3,6,8-TRISULFONIC ACID
CONGO VIOLET CYANOL GREEN 2-NAPHTHOL-8-SULFONIC ACID SODIUM SALT

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7-hydroxynaphthalene-1-sulphonic acid 7-hydroxynaphthalene-1-sulfonic acid 7-Hydroxy-1-naphthalenesulfonic acid 1-Naphthalenesulfonic acid, 7-hydroxy- 132-57-0 Intermediates of Dyes and Pigments