| Identification | Back Directory | [Name]
1-hydroxynaphthalene-2-sulphonic acid | [CAS]
567-18-0 | [Synonyms]
1-Hydroxy
1-NAPHTHOL-2-SULPHONICACID
1-Hydroxy-2-naphthalenesulfonic acid
1-Hydroxynaphthalene-2-sulfonic acid
1-hydroxynaphthalene-2-sulphonic acid
2-Naphthalenesulfonic acid, 1-hydroxy- | [EINECS(EC#)]
209-303-4 | [Molecular Formula]
C10H8O4S | [MOL File]
567-18-0.mol | [Molecular Weight]
224.23 |
| Hazard Information | Back Directory | [Chemical Properties]
1-Hydroxynaphthalene-2-sulfonic acid [567-18-0]. Baum’s acid, C10H8O4S, Mr 224.23, is sparingly soluble in water and is precipitated from aqueous solution by hydrochloric acid. Coupling with diazo compounds and nitrosation both take place in the 4-position. Sulfonation gives 1-naphthol-2,4-disulfonic acid and nitration gives 2,4-dinitro-1-naphthol. | [Preparation]
The reaction of 1-naphthol with oleum in the cold yields a mixture of the 2- and 4- sulfonic acids; the former may be separated from the aqueous quenched reaction mixture by salting out the potassium salt after removing unreacted 1-naphthol. |
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