| Identification | Back Directory | [Name]
2-Naphthol-5,7-disulfonic acid | [CAS]
575-05-3 | [Synonyms]
2-Naphthol-5,7-disulfonic acid
6-hydroxynaphthalene-1,3-disulfonic acid
1,3-Naphthalenedisulfonic acid, 6-hydroxy- | [Molecular Formula]
C10H8O7S2 | [MDL Number]
MFCD29918914 | [MOL File]
575-05-3.mol | [Molecular Weight]
304.3 |
| Hazard Information | Back Directory | [Chemical Properties]
2-Hydroxynaphthalene-5,7-disulfonic acid [575-05-3]. (6-hydroxynaphthalene-1,3- disulfonic acid), C10H8O7S2, Mr 304.3, and its alkali-metal salts are readily soluble in water. Diazo coupling takes place in the 1-position. | [Uses]
The acid has some use as an azo coupling component and as an intermediate in the production of 2,5-dihydroxynaphthalene-7- sulfonic acid. | [Production Methods]
2-Aminonaphthalene-5,7-disulfonic acid is heated with 5 % sulfuric acid for 15 h at 185℃ under pressure. After liming out and removal of ammonia and calcium ions, the product is obtained as a solution of the sodium salt for further use. |
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