Noun
Any one of a series of hydroxyl derivatives of naphthalene, analogous to phenol. In general they are crystalline substances with a phenol (carbolic) odor.
Source: Webster's dictionaryNovoperm® Red HFG by Clariant is a naphthol. Source: Internet
Pigment Red 170 Paste by Hangzhou Epsilon Chemical is naphthol AS-based red color organic pigment paste. Source: Internet