Hydroxynaphthoic acid may refer to any of several isomers..
+ Hydroxynaphthoic Acids Compound Registry number (RN) melting point (°C)2-Hydroxy-1-naphthoic acid2283-08-1156–1573-Hydroxy-1-naphthoic acid19700-42-6248 – 249 4-Hydroxy-1-naphthoic acid7474-97-7188 – 1895-Hydroxy-1-naphthoic acid2437-16-32366-Hydroxy-1-naphthoic acid2437-17-42137-Hydroxy-1-naphthoic acid2623-37-22568-Hydroxy-1-naphthoic acid1769-88-61691-Hydroxy-2-naphthoic acid86-48-6 2003-Hydroxy-2-naphthoic acid92-70-62224-Hydroxy-2-naphthoic acid1573-91-7 225 – 2265-Hydroxy-2-naphthoic acid2437-18-5215 – 2166-Hydroxy-2-naphthoic acid16712-64-4245 – 2487-Hydroxy-2-naphthoic acid613-17-22748-Hydroxy-2-naphthoic acid5776-28-3229 References