4-methyl-5-oxido-1,2,5-oxadiazol-5-ium-3-carboxylic acid

4-甲基-5-氧基呋咱-3-羧酸

Also known as: 4-methyl-1,2,5-oxadiazole 5-oxide-3-carboxylic acid, 4-methyl-5-oxido-1-oxa-2-aza-5-azoniacyclopenta-2,4-diene-3-carboxylic acid, 3-methyl-4-furoxancarboxylic acid, 5-methyl-4-furoxancarboxylic acid, 4-Methyl-1,2,5-oxadiazole-5-oxide-3-carboxylic Acid, 4-methyl-5-oxy-furazan-3-carboxylic acid

4-methyl-5-oxido-1,2,5-oxadiazol-5-ium-3-carboxylic acid (CAS 37132-21-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H4N2O4 and a molecular weight of 144.08600 g/mol. It is also known as 4-methyl-1,2,5-oxadiazole 5-oxide-3-carboxylic acid, 4-methyl-5-oxido-1-oxa-2-aza-5-azoniacyclopenta-2,4-diene-3-carboxylic acid and 3-methyl-4-furoxancarboxylic acid. Key properties include a boiling point of 354.8ºC at 760 mmHg, a density of 1.77g/cm3 and a flash point of 168.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

37132-21-1

Jingsj CID

J-1083779-5

Molecular Formula

C₄H₄N₂O₄

Chinese Name

4-甲基-5-氧基呋咱-3-羧酸

Molecular Weight

144.08600 g/mol

Category

Organic Acids

Last updated

8/21/2026