Title: Piperonylic Acid
CAS Registry Number: 94-53-1
CAS Name: 1,3-Benzodioxole-5-carboxylic acid
Additional Names: 3,4-methylenedioxybenzoic acid; protocatechuic acid methylene ether
Molecular Formula: C8H6O4
Molecular Weight: 166.13
Percent Composition: C 57.84%, H 3.64%, O 38.52%
Literature References: Occurs in Paracoto bark. Prepd by permanganate oxidation of piperonal: Shriner, Kleiderer, Org. Synth. 10, 82 (1930).
Properties: Prisms (by sublimation), needles from alc, feathery crystals from water. mp 229°. Sublimes around 210°. Slightly sol in water, chloroform, cold alcohol, ether. Absorption spectrum: Dobbie, Lauder, J. Chem. Soc. 83, 621 (1903).
Melting point: mp 229°
Derivative Type: Methyl ester
Molecular Formula: C9H8O4
Molecular Weight: 180.16
Percent Composition: C 60.00%, H 4.48%, O 35.52%
Properties: mp 53°. Sublimes easily. Volatile in steam. Freely sol in alcohol, ether.
Melting point: mp 53°
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