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132-57-0

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132-57-0 Structure

132-57-0 Structure
IdentificationBack Directory
[Name]

7-hydroxynaphthalene-1-sulphonic acid
[CAS]

132-57-0
[Synonyms]

7-hydroxynaphthalene-1-sulfonic acid
7-Hydroxy-1-naphthalenesulfonic acid
7-hydroxynaphthalene-1-sulphonic acid
1-Naphthalenesulfonic acid, 7-hydroxy-
[EINECS(EC#)]

205-066-6
[Molecular Formula]

C10H8O4S
[MOL File]

132-57-0.mol
[Molecular Weight]

224.23
Chemical PropertiesBack Directory
[Boiling point ]

335.63°C (rough estimate)
[density ]

1.4643 (rough estimate)
[refractive index ]

1.5400 (estimate)
[pka]

0.26±0.40(Predicted)
[EPA Substance Registry System]

1-Naphthalenesulfonic acid, 7-hydroxy- (132-57-0)
Safety DataBack Directory
[Symbol(GHS) ]


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
Raw materials And Preparation ProductsBack Directory
[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)
Hazard InformationBack Directory
[Chemical Properties]

Colorless crystals. Easily soluble in water and alcohol.
[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.
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