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| | 4,7-dihydroxynaphthalene-2-sulphonic acid Basic information |
| Product Name: | 4,7-dihydroxynaphthalene-2-sulphonic acid | | Synonyms: | 4,7-dihydroxynaphthalene-2-sulphonic acid;4,7-Dihydroxy-2-naphthalenesulfonic acid;4,7-dihydroxynaphthalene-2-sulfonic acid;1,6-Dihydroxy-3-naphthalenesulfonic acid;Einecs 228-759-5;2-Naphthalenesulfonic acid, 4,7-dihydroxy- | | CAS: | 6357-94-4 | | MF: | C10H8O5S | | MW: | 240.23 | | EINECS: | 228-759-5 | | Product Categories: | | | Mol File: | 6357-94-4.mol |  |
| | 4,7-dihydroxynaphthalene-2-sulphonic acid Chemical Properties |
| | 4,7-dihydroxynaphthalene-2-sulphonic acid Usage And Synthesis |
| Chemical Properties | 4,7-Dihydroxynaphthalene-2-sulfonic acid [6357-94-4]. (2,5-dihydroxynaphthalene-7- sulfonic acid), dioxy J acid, C10H8O5S, Mr 240.2, is readily soluble in water; its sodium salt is much less soluble and is easily salted out. Amination with NH3– NaHSO3 yields J acid. | | Uses | ?Although not used as a precursor for J acid itself, 4,7-dihydroxynaphthalene-2-sulphonic acid can be used advantageously for the production of some N-substituted J acids. | | Production Methods | 2-Hydroxynaphthalene-5,7-disulfonic acidis heated with aqueous NaOH – KOH for 5 h at 175℃. The melt is poured into water and acidified with hydrochloric acid, and the precipitated solid is filtered off and washed with brine; the yield is 80 %. |
| | 4,7-dihydroxynaphthalene-2-sulphonic acid Preparation Products And Raw materials |
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