2-keto-3-butynoic acid is a chemical compound registered under CAS number 56842-75-2, with the molecular formula C4H2 O3 and a molecular weight of about 98.06 g/mol. It is also known as 2-Oxobut-3-ynoic acid; 3-butynoic acid, 2-oxo-. NewsChem supplies 2-keto-3-butynoic acid for laboratory research and bulk production; product code 642669. Send an inquiry for purity, packaging, price and lead time.