Structural Formula Vector Image
Title: p-Hydroxybenzaldehyde
CAS Registry Number: 123-08-0
Additional Names: 4-Formylphenol
Molecular Formula: C7H6O2
Molecular Weight: 122.12
Percent Composition: C 68.85%, H 4.95%, O 26.20%
Literature References: Widely distributed in plants in very small amounts. Obtained as a byproduct from the Reimer-Tiemann reaction for salicylaldehyde from phenol: L. F. Fieser, M. Fieser, Organic Chemistry (Reinhold, New York, 3rd ed., 1956) p 681; cf. Reimer, Tiemann, Ber. 9, 824 (1876); Herzfeld, Tiemann, Ber. 10, 64 (1877).
Properties: Needles from water. Slight, agreeable, aromatic odor, mp 116°. Sublimes at atmospheric pressure without decomposition. Reacts like a weak monobasic acid: Ka at 25° = 2.2´10-8. Dipole moment: 4.19. Sparingly sol in cold water: 1.38 g/100 ml H2O at 30.5°; more sol in hot water. Freely sol in alc, ether. Slightly sol in benzene: 3.68 g/100 ml C6H6 at 65°.
Melting point: mp 116°

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