3-Hydroxy-2-naphthoic Acid
Title: 3-Hydroxy-2-naphthoic Acid
CAS Registry Number: 92-70-6
CAS Name: 3-Hydroxy-2-naphthalenecarboxylic acid
Additional Names: 3-naphthol-2-carboxylic acid
Molecular Formula: C11H8O3
Molecular Weight: 188.18
Percent Composition: C 70.21%, H 4.29%, O 25.51%
Literature References: Obtained by the action of CO2 on the sodium salt of b-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).
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.
Melting point: mp 222-223°
Derivative Type: Magnesium salt
Trademarks: Regacholyl
Use: The water-sol sodium salt has been used to solubilize riboflavin: Arnold et al., Poult. Sci. 31, 350 (1952).

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