3,4-Dihydroxybenzaldehyde

3,4-Dihydroxybenzaldehyde is a phenolic aldehyde, a compound released from cork stoppers into wine.

3,4-Dihydroxybenzaldehyde

This molecule can be used as a precursor in the vanillin synthesis by biotransformation by cell cultures of Capsicum frutescens, a type of Chili pepper. It is also found in the mushroom Phellinus linteus.

Title: 3,4-Dihydroxybenzaldehyde

CAS Registry Number: 139-85-5

CAS Name: 3,4-Dihydroxybenzaldehyde

Additional Names: 3,4-dihydroxybenzenecarbonal; protocatechuic aldehyde; rancinamycin IV; protocatechualdehyde

Molecular Formula: C7H6O3

Molecular Weight: 138.12

Percent Composition: C 60.87%, H 4.38%, O 34.75%

Literature References: Prepn from catechol: Reimer, Tiemann, Ber. 9, 1268 (1876); Tiemann, Koppe, ibid. 14, 2015 (1881); from

vanillin: Tiemann, Haarmann, ibid. 7, 620 (1874); from veratric aldehyde: Dreyfus, DE 193958; Frdl. 9, 161 (1908-10); from piperonal: Hoering, Baum, Ber. 41, 1914 (1908); Barger, J. Chem. Soc. 93, 563 (1908); Buck, Zimmerman, Org. Synth. coll. vol. II, 549 (1943).
Properties: Platelets from water or toluene. Dimorphic. Dec 153-154°. pK (25°) 7.55. Soly in water (g/100 ml): 5 (20°); 33 (99°); in

ethanol: 79 (78°). Freely sol in ether.


pKa: pK (25°) 7.55