Title: 1-Nitroso-2-naphthol
CAS Registry Number: 131-91-9
CAS Name: 1-Nitroso-2-naphthalenol
Additional Names: nitroso-b-naphthol
Molecular Formula: C10H7NO2
Molecular Weight: 173.17
Percent Composition: C 69.36%, H 4.07%, N 8.09%, O 18.48%
Literature References: Prepared by the addition of H2SO4 to a mixture of b-naphthol dissolved in aq NaOH and NaNO2: C. S. Marvel, P. K. Porter, Org. Synth. coll. vol. I, 411 (2nd ed., 1941).
Properties: Yellowish-brown needles from petr ether, mp 109-110°. Sol in 1000 parts water, 35 parts alcohol; also sol in hot alcohol, benzene, ether, carbon disulfide, caustic alkali solns, glacial acetic acid; slightly sol in cold petr ether.
Melting point: mp 109-110°
Use: To prevent gum formation in gasoline; in analytical chemistry in the determination of cobalt (to separate it from nickel).

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