1-Naphthol
Title: 1-Naphthol
CAS Registry Number: 90-15-3
CAS Name: 1-Naphthalenol
Additional Names: a-naphthol; alpha-naphthol; a-hydroxynaphthalene
Molecular Formula: C10H8O
Molecular Weight: 144.17
Percent Composition: C 83.31%, H 5.59%, O 11.10%
Literature References: Prepd by fusing the sodium salt of a-naphthalenesulfonic acid with NaOH: Tyrer, US 2407044; US 2407055; US 2451996 (1946, 1946, 1948); by oxidation of naphthalene: Loeb, US 3033903 (1962 to Union Carbide). Toxicity data: H. F. Smyth et al., Am. Ind. Hyg. Assoc. J. 23, 95 (1962).
Properties: Prisms, mp 96°. Phenolic odor; disagreeable, burning taste. bp 288°; bp40 184°. d498.7 1.0954. uv max: 297, 310, 324 nm. Sublimable; volatile with steam. Darkens in light; reduces ammoniacal silver nitrate. Slightly sol in water, freely in alcohol, benzene, chloroform, ether, alkali hydroxide solns. Protect from light. LD50 orally in rats: 2.59 g/kg (Smyth).
Melting point: mp 96°
Boiling point: bp 288°; bp40 184°
Absorption maximum: uv max: 297, 310, 324 nm
Density: d498.7 1.0954
Toxicity data: LD50 orally in rats: 2.59 g/kg (Smyth)
CAUTION: See 2-Naphthol.
Use: Manuf dyes, intermediates, synthetic perfumes; also in microscopy.

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