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117-22-6 CAS117-22-6 1-Hydroxynaphthalene-8-sulfonic acid

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Appearance:white powder
Application:curing agent
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CAS117-22-6 1-Hydroxynaphthalene-8-sulfonic acid

Product Name:	1-Hydroxynaphthalene-8-sulfonic acid
Synonyms:	8-hydroxy-1-naphthalenesulfonic acid;alpha-Naphthol-8-sulfonic acid;1-Hydroxynaphthalene-8-sulfonic acid;1-NAPHTHOL-8-SULFONIC ACID;1 NAPTHOL-8-SULPHONIC ACID;8-hydroxynaphthalenesulphonic acid;8hydroxynaphthalene-1-sulfonic acid;1-Naphthalenesulfonic acid, 8-hydroxy-
CAS:	117-22-6
MF:	C10H8O4S
MW:	224.23
EINECS:	204-180-3
Product Categories:	Intermediates of Dyes and Pigments
Mol File:	117-22-6.mol

1-Hydroxynaphthalene-8-sulfonic acid Chemical Properties

density	1.549
pka	0.05±0.40(Predicted)
CAS DataBase Reference	117-22-6(CAS DataBase Reference)
EPA Substance Registry System	1-Naphthalenesulfonic acid, 8-hydroxy- (117-22-6)

Safety Information

MSDS Information

1-Hydroxynaphthalene-8-sulfonic acid Usage And Synthesis

Chemical Properties	1-Hydroxynaphthalene-8-sulfonic acid [117-22-6]. (8-hydroxynaphthalene-1-sulfonic acid), C10H8O4S, Mr 224.2, crystallizes as the monohydrate with mp 106℃. Sulfonation gives 1-hydroxynaphthalene-4,8-disulfonic acid, and alkali fusion with potassium hydroxide at 230℃ yields 1,8-dihydroxynaphthalene. Coupling with diazo compounds occurs in the 2- position.
Uses	The naphthosultone is usually satisfactory as an intermediate for further processing; however, for azo dye preparation the free naphthol must be used, for example, in C.I. Acid Black 54 and C.I. Acid Blue 158.
Production Methods	1-Aminonaphthalene-8-sulfonic acid is diazotized over 16 h at 50℃ and then heated to 80 ℃. After cooling, the precipitated naphthosultone is filtered off and washed. The sultone is heated with dilute sodium hydroxide at 100℃, which causes ring opening; the product is isolated after salting out.

1-Hydroxynaphthalene-8-sulfonic acid Preparation Products And Raw materials

Raw materials	Sodium hydroxide-->Hydrochloric acid-->Ethyl acetate-->Peri acid
Preparation Products	Acid Blue 158-->Chromate(2-), hydroxy[3-(hydroxy-κO)-4-[[1-(hydroxy-κO)-8-sulfo-2-naphthalenyl]azo-κN1]-7-nitro-1-naphthalenesulfonato(4-)]-, disodium, (T-4)-