1-Methylimidazolium hydrogen sulfate

1-甲基咪唑鎓硫酸氢盐

Also known as: 1-Methylimidazole hydrogen sulfate, 1-Methylimidazolium hydrogensulfate, BASIONIC AC 39, BASIONIC TM AC 39, Basionics AC 39, HMIM HSO4, Methylimidazolium hydrogensulfate, MIM·HSO4, MFCD06798198, 1-hydrogen-3-methylimidazolium hydrosulfate

1-Methylimidazolium hydrogen sulfate (CAS 681281-87-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H8N2O4S and a molecular weight of 180.18200 g/mol. It is also known as 1-Methylimidazole hydrogen sulfate, 1-Methylimidazolium hydrogensulfate and BASIONIC AC 39. Key properties include a melting point of 64-65°C (lit.), a boiling point of 198.7ºC at 760 mmHg, a density of 1.484g/mLat 25°C (lit.) and a flash point of >280ºC. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

681281-87-8

Jingsj CID

J-1993480-4

Molecular Formula

C₄H₈N₂O₄S

Chinese Name

1-甲基咪唑鎓硫酸氢盐

Molecular Weight

180.18200 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026