Keywords

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

Quick Details

• ProName: CAS117-22-6 1-Hydroxynaphthalene-8-su...
• CasNo: 117-22-6
• Molecular Formula: C4H3NO2S
• Appearance: white powder
• Application: curing agent
• DeliveryTime: within 1-3 days
• PackAge: carton box
• Port: tianjin/shanghai/qingdao
• ProductionCapacity: 1000000 Kilogram/Month
• Purity: 99%
• Storage: cool and dry
• Transportation: by air by sea or by express
• LimitNum: 1 Metric Ton
• Grade: Industrial Grade
• Appearance: white liquid
• Content: 99.0-100.5%

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Product information

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

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

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

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

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

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.