59760

1-Methylimidazolium hydrogen sulfate

95%

• Synonym(s): 1-Methylimidazole hydrogen sulfate
• Empirical Formula (Hill Notation): C₄H₆N₂ · H₂SO₄
• CAS Number: 681281-87-8
• Molecular Weight: 180.18
• MDL number: MFCD06798198
• UNSPSC Code: 12352100
• PubChem Substance ID: 57651695
• NACRES: NA.22

Properties

• assay: ≥94.5% (HPLC); 95%
• form: solid
• impurities: ≤1% water
• anion traces: chloride (Cl^-): ≤20 mg/kg
• SMILES string: OS(O)(=O)=O.Cn1ccnc1
• InChI: 1S/C4H6N2.H2O4S/c1-6-3-2-5-4-6;1-5(2,3)4/h2-4H,1H3;(H2,1,2,3,4)
• InChI key: TVEOIQKGZSIMNG-UHFFFAOYSA-N

Description

Application

1-Methylimidazolium hydrogen sulfate is a Brønsted acidic ionic liquid that can be used:

• As a component of a catalytic system along with chlorotrimethylsilane used in the preparation of 3,4-dihydropyrimidin-2(1H)-ones and hydroquinazoline-2,5-diones.
• As a catalyst in the preparation of biologically important 2,5-dimethyl-N-substituted pyrroles.
• As a reusable catalyst in the preparation of spiro[indoline-3′,2-quinazoline]2′,4(3H)-dione.
• In the leaching of copper and zinc in brass dross using H₂O₂ as an oxidant.

Safety Information

• pictograms: GHS05
• signalword: Danger
• hcodes: H314
• pcodes: P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363
• Hazard Classifications: Eye Dam. 1 - Skin Corr. 1B
• Storage Class: 8A - Combustible corrosive hazardous materials
• wgk_germany: WGK 3
• flash_point_f: >536.0 °F - (External MSDS)
• flash_point_c: > 280 °C - (External MSDS)
• ppe: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges