4,5-dihydroxynaphthalene-1-sulphonic acid
![4,5-dihydroxynaphthalene-1-sulphonic acid Structure](CAS/GIF/83-65-8.gif)
- 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
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
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
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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