| Identification | Back Directory | [Name]
4-aminonaphthalene-1,6-disulfonic acid | [CAS]
85-75-6 | [Synonyms]
Dahl's acid III
1-naphthylamine-4,7-disulfonic acid
4-aminonaphthalene-1,6-disulfonic acid
4-Amino-1,6-naphthalenedisulfonic acid
4-azanylnaphthalene-1,6-disulfonic acid
4-aminonaphthalene-1,6-disulphonic acid
1,6-Naphthalenedisulfonic acid, 4-amino- | [EINECS(EC#)]
201-630-0 | [Molecular Formula]
C10H9NO6S2 | [MDL Number]
MFCD00035723 | [MOL File]
85-75-6.mol | [Molecular Weight]
303.31 |
| Hazard Information | Back Directory | [Description]
1-Aminonaphthalene-4,7-disulfonic acid [85-75-6]. (4-aminonaphthalene-1,6-disulfonic acid), Dahl’s acid III, C10H9NO6S2, Mr 303.3, and its sodium salt are readily soluble in water, but the calcium and barium salts are only sparingly soluble. Conversion to 1-hydroxynaphthalene-4,7-disulfonic acid is achieved by reverse-Bucherer reaction or diazotization and hydrolysis. Sulfonation (35 % oleum, 90℃) yields 1-aminonaphthalene-2,4,7-trisulfonic acid. | [Production Methods]
?Although separation of 4-aminonaphthalene-1,6-disulfonic acid from the mixture obtained by sulfonation of naphthionic acid is not practicable on a large scale, the 1,4,7-isomer can be obtained directly in high yield by sulfonation of 1-aminonaphthalene-7-sulfonic acid with oleum. |
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