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1-Ethyl-3-methylimidazolium methanesulfonate

1-乙基-3-甲基咪唑甲烷磺酸盐

Also known as: 1-Ethyl-3-methylimidazolium methylsulfonate, EMIM CH3SO3, [C2MIm]MS, BASIONIC ST 35, BASIONIC(R) ST 35, BASIONIC(TM) ST 35, 1-Ethyl-3-methyl-1H-imidazol-3-ium methanesulfonate, 3-Ethyl-1-methyl-1H-imidazol-3-ium methanesulfonate, MFCD06798171

1-Ethyl-3-methylimidazolium methanesulfonate (CAS 145022-45-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H14N2O3S and a molecular weight of 206.263 g/mol. It is also known as 1-Ethyl-3-methylimidazolium methylsulfonate, EMIM CH3SO3 and [C2MIm]MS. Key properties include a melting point of 35ºC, a boiling point of 363ºC at 760 mmHg, a density of 1.247 and a flash point of 67ºC. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
145022-45-3
Jingsj CID
J-1991029-1
Molecular Formula
C7H14N2O3S
Chinese Name
1-乙基-3-甲基咪唑甲烷磺酸盐
Molecular Weight
206.263 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point35ºC
Boiling Point363ºC at 760 mmHg
Density1.247
Flash Point67ºC

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of 1-Ethyl-3-methylimidazolium methanesulfonate?

The CAS number of 1-Ethyl-3-methylimidazolium methanesulfonate is 145022-45-3.

What are the molecular formula and molecular weight of 1-Ethyl-3-methylimidazolium methanesulfonate?

1-Ethyl-3-methylimidazolium methanesulfonate has molecular formula C7H14N2O3S and molecular weight 206.263 g/mol.

Is 1-Ethyl-3-methylimidazolium methanesulfonate hazardous?

1-Ethyl-3-methylimidazolium methanesulfonate has GHS signal word Warning.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "1-Ethyl-3-methylimidazolium methanesulfonate (CAS 145022-45-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1991029-1 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.