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4,5-dihydroxynaphthalene-1-sulphonic acid

4,5-dihydroxynaphthalene-1-sulphonic acid Structure
CAS No.
83-65-8
Chemical Name:
4,5-dihydroxynaphthalene-1-sulphonic acid
Synonyms
4,5dihydroxynaphthalene-1-sulfonic acid;4,5-Dihydroxy-1-naphthalenesulfonic acid;4,5-dihydroxynaphthalene-1-sulphonic acid;1-Naphthalenesulfonic acid, 4,5-dihydroxy-
CBNumber:
CB4892298
Molecular Formula:
C10H8O5S
Molecular Weight:
240.23
MOL File:
83-65-8.mol
Modify Date:
2023/11/2 14:15:33
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4,5-dihydroxynaphthalene-1-sulphonic acid Properties

Density 1.677±0.06 g/cm3(Predicted)
pka 0.82±0.40(Predicted)
EPA Substance Registry System 4,5-Dihydroxy-1-naphthalenesulfonic acid (83-65-8)

4,5-dihydroxynaphthalene-1-sulphonic acid Chemical Properties,Uses,Production

Description

4,5-Dihydroxynaphthalene-1-sulfonic acid [83-65-8]. (1,8-dihydroxynaphthalene-4- sulfonic acid), dioxy Chicago acid, dioxy S acid, C10H8O5S, Mr 240.2, is sparingly soluble in water, but the sodium salt is readily soluble. Heating with dilute sulfuric acid at 150℃ gives 1,8-dihydroxynaphthalene.

Production Methods

1-Hydroxynaphthalene-4,8- disulfonic acid is heated with 82 % caustic soda liquor for 3 h at 235℃. The melt is poured into excess hydrochloric acid and sulfur dioxide is expelled. After cooling, the product is filtered off and washed with brine; the yield is 83 %.

4,5-dihydroxynaphthalene-1-sulphonic acid Preparation Products And Raw materials

Raw materials

Sodium hydroxide

Preparation Products

1-Naphthalenesulfonic acid, 4,5-dihydroxy-3-[(4-sulfophenyl)azo]-, disodium salt Direct Black 24 Direct Green 22 Benzoic acid, 3-[[4-[(1,8-dihydroxy-4-sulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-2(or 6)-hydroxy-, disodium salt 4,5-Dihydroxy-3-[[2-ethoxy-4-[(8-sodiosulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]naphthalene-1-sulfonic acid sodium salt
Direct blue 26, trisodium salt Acid Black 5 Direct Blue 157
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4,5-dihydroxynaphthalene-1-sulphonic acid Suppliers

Global( 4)Suppliers
Supplier Tel Country ProdList Advantage Inquiry
Hu Bei Jiutian Bio-medical Technology CO.,Ltd 027-88013699 17354350817 China 7431 58 Inquiry
Dynasty Colourants Co., Ltd. 86 0574 27862107 27862719 China 3306 51 Inquiry
Eurolabs Limited 44 1625 850089 United Kingdom 6323 46 Inquiry
Supplier Advantage
Hu Bei Jiutian Bio-medical Technology CO.,Ltd 58
Dynasty Colourants Co., Ltd. 51
Eurolabs Limited 46
4,5-dihydroxynaphthalene-1-sulphonic acid 4,5-Dihydroxy-1-naphthalenesulfonic acid 4,5dihydroxynaphthalene-1-sulfonic acid 1-Naphthalenesulfonic acid, 4,5-dihydroxy- 83-65-8