Nomenclature
CAS number: 88-13-1
3-Thiophenecarboxylic acid; β-thiophenic acid.
C
5H
4O
2S; mol wt 128.15.
C 46.86%, H 3.15%, O 24.97%, S 25.02%.
Description and 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.