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2834-90-4

2834-90-4 Structure

2834-90-4 Structure
IdentificationBack 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
Raw materials And Preparation ProductsBack Directory
Hazard InformationBack 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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