1-Ethyl-3-methylimidazolium methanesulfonate
1-Ethyl-3-methylimidazolium methanesulfonate (CAS 145022-45-3), with the molecular formula C7H14N2O3S and a molar mass of 206.26 g/mol, is a Basionic® ionic liquid. This specialty chemical finds application in chemical synthesis and serves as a versatile component in various industrial processes. Its unique properties as an ionic liquid make it valuable for specific research and development initiatives. Tech Serve Solutions offers this compound with a purity of ≥95%.
- IUPAC
- Basionics® ST 35

Basionic Ionic Liquids
1-Ethyl-3-methylimidazolium methanesulfonate is classified as a Basionic® ionic liquid, indicating its use in specialized chemical synthesis applications. These compounds are often employed as alternatives to traditional solvents due to their unique physicochemical properties.
Chemical Synthesis
This imidazolium salt is utilised in chemical synthesis processes. Its ionic nature can influence reaction kinetics and selectivity, offering potential advantages in various organic transformations.
Specialty Synthesis
As a specialty chemical, it is suitable for advanced synthetic methodologies and research purposes. Its application is primarily focused on niche areas within chemical research and development.
| Molecular weight | 206.26 |
|---|---|
| Empirical formula | C7H14N2O3S |
| Assay | ≥95% |
| Impurities tested | ≤0.5% water |
| Application | Basionic Ionic Liquids |

Hazard statements
- H317May cause an allergic skin reaction
- H412Harmful to aquatic life with long-lasting effects
Precautionary statements
- P273Avoid release to the environment
- P280Wear protective gloves, clothing and eye/face protection
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 286 °C / 546.8 °F |
| Transport (UN / ADR) | UN 3265 8/PG 2 |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 43-52/53 |
| Safety statements (S) | 36/37-61 |
| Anion traces | chloride (Cl-): ≤2% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 1-Ethyl-3-methylimidazolium methanesulfonate used for?
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1-Ethyl-3-methylimidazolium methanesulfonate is primarily used in chemical synthesis, particularly as a Basionic® ionic liquid for specialty applications and research purposes.
What is the CAS number and molecular formula?
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The CAS number for 1-Ethyl-3-methylimidazolium methanesulfonate is 145022-45-3, and its molecular formula is C7H14N2O3S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1-Ethyl-3-methylimidazolium methanesulfonate with an assay of ≥95%. This is a technical/research grade material, and TSS does not represent it as USP, BP, or EP grade.
What are the primary safety concerns when handling this chemical?
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This compound may cause an allergic skin reaction (H317) and is harmful to aquatic life with long lasting effects (H412). It is essential to use appropriate personal protective equipment, including gloves and eye protection, and avoid release into the environment. Always consult the Safety Data Sheet for full handling information.
How is this chemical typically packed and exported?
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1-Ethyl-3-methylimidazolium methanesulfonate is shipped under UN 3265, Hazard Class 8, Packing Group II. TSS ensures compliant packaging and export procedures for this material.
How can I request a quote or sample?
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To request a quote or a sample of 1-Ethyl-3-methylimidazolium methanesulfonate, please contact our sales department via the website or by phone.
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