6641. 1-Nitroso-2-naphthol

Nomenclature

CAS number: 131-91-9
1-Nitroso-2-naphthalenol; nitroso-β-naphthol.
C10H7NO2; mol wt 173.17.
C 69.36%, H 4.07%, N 8.09%, O 18.48%.

Description and references

Prepared by the addition of H2SO4 to a mixture of β-naphthol dissolved in aq NaOH and NaNO2: C. S. Marvel, P. K. Porter, Org. Synth. coll. vol. I, 411 (2nd ed., 1941).

Chemical structure

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.

Use

To prevent gum formation in gasoline; in analytical chemistry in the determination of cobalt (to separate it from nickel).