3-Thenoic Acid
Title: 3-Thenoic Acid
CAS Registry Number: 88-13-1
CAS Name: 3-Thiophenecarboxylic acid
Additional Names: b-thiophenic acid
Molecular Formula: C5H4O2S
Molecular Weight: 128.15
Percent Composition: C 46.86%, H 3.15%, O 24.97%, S 25.02%
Literature References: Prepd by the oxidation of 3-thenaldehyde with silver oxide: Campaigne, LeSuer, Org. Synth. 33, 94 (1953).
Properties: Crystals from water, mp 137-138°. Soly in water at 25°: 0.43 g/100 g. pKa 6.23. Volatile with steam.
Melting point: mp 137-138°
pKa: pKa 6.23

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