4-Thiazolecarboxylic acid 4-Thiazolecarboxylic acid Synonyms: 4-Thiazolecarboxylic acid; 1,3-Thiazole-4-carboxylic acid; Thiazole-4-Caxboxylicacid CAS NO.: 3973-08-8 Formula: C4H3NO2S Weight: 129.13712