4835. 3-Hydroxy-2-naphthoic Acid

Nomenclature

CAS number: 92-70-6
3-Hydroxy-2-naphthalenecarboxylic acid; 3-naphthol-2-carboxylic acid.
C11H8O3; mol wt 188.18.
C 70.21%, H 4.29%, O 25.51%.

Description and references

Obtained by the action of CO2 on the sodium salt of β-naphthol under pressure at 280-290°: Schmitt, Burkard, Ber. 20, 2702 (1887); DE 50341; Frdl. 2, 133; DE 436034; Chem. Zentralbl. 1926, I, 1717; Frdl. 15, 295; DE 436524; Chem. Zentralbl. 1927, I, 182; Frdl. 15, 298; Schwenk, Chem. Ztg. 53, 335 (1929).

Chemical structure

Properties

Very pale yellow crystals, mp 222-223°. Practically insol in cold water. Slightly sol in hot water. Sol in benzene, chloroform. Freely sol in alc, ether. Sol in alkaline solns.

Derivative

Magnesium salt.

Nomenclature

Regacholyl.

Use

The water-sol sodium salt has been used to solubilize riboflavin: Arnold et al., Poult. Sci. 31, 350 (1952).