| Identification | Back Directory | [Name]
3-hydroxynaphthalene-2,6-disulphonic acid | [CAS]
6361-38-2 | [Synonyms]
Einecs 228-835-8
3-Hydroxy-2,6-naphthalenedisulfonicacid
3-hydroxynaphthalene-2,6-disulphonic acid
2,6-Naphthalenedisulfonic acid, 3-hydroxy- | [EINECS(EC#)]
228-835-8 | [Molecular Formula]
C10H8O7S2 | [MOL File]
6361-38-2.mol | [Molecular Weight]
304.3 |
| Hazard Information | Back Directory | [Chemical Properties]
2-Hydroxynaphthalene-3,7-disulfonic acid [6361-38-2]. (3-hydroxynaphthalene-2,6- disulfonic acid), C10H8O7S2, Mr 304.3: the alkali-metal salts of 85 are readily soluble in water, but its barium salt is only sparingly soluble even at 100 ℃. Sulfonation with 20 % oleum at 85℃ gives mainly 2-hydroxynaphthalene-1,3,7-trisulfonic acid. Amination yields 2-aminonaphthalene-3,7-disulfonic acid, and caustic fusion yields 2,7-dihydroxynaphthalene-3-sulfonic acid. Diazo coupling takes place in the 1-position. | [Preparation]
2-Hydroxynaphthalene-7-sulfonic acid is heated at 120℃ with concentrated sulfuric acid for 12 h, the mixture is poured into water, and the product is separated after liming out. |
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