1-Naphthols

Azorubine, also known as carmoisine, is an azo dye consisting of two naphthalene subunits. It is a red solid. It is mainly used in foods that are heat-treated after fermentation. It has E number E122.

1-Naphthol, or α-naphthol, is an organic compound with the formula . It is a fluorescent white solid. 1-Naphthol differs from its isomer 2-naphthol by the location of the hydroxyl group on the naphthalene ring. The naphthols are naphthalene homologues of phenol. Both isomers are soluble in simple organic solvents. They are precursors to a variety of useful compounds.

chemical compound

chemical compound

chemical compound

α-Naphtholphthalein (C28H18O4) is a phthalein dye used as a pH indicator with a visual transition from colorless/reddish to greenish blue at pH 7.3–8.7.

fluorescent reagent used in analytical chemistry

Menadiol is an organic compound with the formula C6H4(COH)2(CH)(CH3). It is formally the p-hydroquinone derivative of 2-methylnaphthalene. The name vitamin K4 can refer to: specifically this compound, its various esters, e.g. menadiol diacetate (acetomenaphthone), menadiol dibutyrate, menadiol dimalonate, or its various salts, like menadiol sodium diphosphate (Kappadione) menadiol sodium disulfate.

chemical compound

chemical compound

chemical compound

4-amino-3-methyl-1-naphthol is a synthetic menadione analog. It is also known as vitamin K7, and was named as such in 1950 when it was recognized as a compound with vitamin K activity.