| Identification | Back Directory | [Name]
1-naphthol-4,7-disulfonic acid | [CAS]
6361-37-1 | [Synonyms]
1-naphthol-4,7-disulfonic acid
4-hydroxynaphthalene-1,6-disulfonic acid
1,6-Naphthalenedisulfonic acid, 4-hydroxy- | [Molecular Formula]
C10H8O7S2 | [MOL File]
6361-37-1.mol | [Molecular Weight]
304.3 |
| Hazard Information | Back Directory | [Chemical Properties]
1-Hydroxynaphthalene-4,7-disulfonic acid [6361-37-1]. (4-hydroxynaphthalene-1,6- disulfonic acid), D(Dahl’s)acid, C10H8O7S2, Mr 304.3: its alkali-metal salts are readily soluble in water. Boiling with 65 % sulfuric acid results in desulfonation and formation of 1-hydroxynaphthalene-7-sulfonic acid. Diazo coupling and nitrosation take place in the 2-position. | [Production Methods]
1-Aminonaphthalene-4,7-disulfonic acid is heated with sodium bisulfite under conditions similar to those described for the production of 1-hydroxynaphthalene-4-sulfonic acid from sodium naphthionate. High yields of 1-Aminonaphthalene-4,7-disulfonic acid have been claimed via sulfonation of 1-(dichlorophosphinyloxy)naphthalene (1-naphthol+ POCl3).
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