| Identification | Back Directory | [Name]
4-amino-1-naphthol | [CAS]
2834-90-4 | [Synonyms]
4-amino-1-naphthol
1-Amino-4-naphthol
4-Amino-1-naphthalenol
4-azanylnaphthalen-1-ol
1-Amino-4-hydroxynaphthalene | [Molecular Formula]
C10H9NO | [MDL Number]
MFCD00151985 | [MOL File]
2834-90-4.mol | [Molecular Weight]
159.18 |
| Hazard Information | Back Directory | [Chemical Properties]
Acicular crystals. Soluble in water. | [Uses]
Inhibitor of polymerization, chemical intermediate. Must be kept dry during storage to avoid oxidation and discoloration. | [Production Methods]
Orange I in aqueous alkaline solution is treated with sodium dithionite at 40 – 50℃, and the resulting suspension is heated to 70℃ to complete the reaction. The crude product is collected by filtration and dissolved in hot aqueous hydrochloric acid in the presence of a reducing agent. On cooling, needles of the hydrochloride salt crystallize and can be isolated in 70 % yield. Alternatively, the crude paste may be dissolved in dilute alkali in the presence of a reducing agent and acylated with acetic anhydride or acryloyl chloride, for example, to give 4- acetylamino-1-naphthol or 4-acryloylamino-1- naphthol, which have been used as azo coupling components. |
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