Vainillina; Vaniliini; Vanilin; Vanilinas; Vanillic Aldehyde; Vanilline; Vanillinum; Wanilina. 4-Hydroxy-3-methoxybenzaldehyde.

Chemical formula: C₈H₈O₃ = 152.1.

CAS — 121-33-5.

Pharmacopoeias.

In Eur. and Viet. Also in USNF.

Ph. Eur. 6.2

(Vanillin). White or slightly yellowish crystalline needles or powder. M.p. 81° to 84°. Slightly soluble in water; freely soluble in alcohol and in methyl alcohol; it dissolves in dilute solutions of alkali hydroxides. Protect from light.

USNF 26

(Vanillin). Fine, white to slightly yellow crystals, usually needle-like, having an odour and taste suggestive of vanilla. M.p. 81° to 83°. Soluble 1 in 100 of water at 25°, 1 in 20 of water at 80°, 1 in 20 of glycerol; freely soluble in alcohol, in chloroform, in ether, and in solutions of fixed alkali hydroxides. Its solutions are acid to litmus. Store in airtight containers. Protect from light.