1-Butyl-3-methylimidazolium methyl sulfate
1-Butyl-3-methylimidazolium methyl sulfate (CAS 401788-98-5, C9H18N2O4S) is a Basionics ionic liquid with a molecular weight of 250.32 g/mol. This compound is characterised by its ionic nature and finds application as a versatile reagent in chemical synthesis. Its properties make it suitable for various research and development activities within the specialty chemicals sector.
- IUPAC
- BMIMMeSO4

Basionic Ionic Liquids
This compound is classified as a Basionic Ionic Liquid, a class of salts that are liquid at or near room temperature. These are employed in diverse synthetic applications owing to their unique solvent properties and low volatility.
Chemical Synthesis
As a specialty synthesis reagent, 1-Butyl-3-methylimidazolium methyl sulfate serves as a valuable component in various organic transformations. Its ionic structure can influence reaction pathways and yields in complex syntheses.
Ionic Liquid Applications
Ionic liquids, including this imidazolium-based salt, are explored for their potential in catalysis, electrochemistry, and materials science. They offer a greener alternative to conventional volatile organic solvents in many processes.
| Molecular weight | 250.32 |
|---|---|
| Empirical formula | C9H18N2O4S |
| Assay | ≥97.0% (HPLC) |
| Density | 1.21 g/mL at 20 °C |
| Refractive index | n20/D 1.478 |
| Application | Basionic Ionic Liquids |

Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Transport (UN / ADR) | UN 3265 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-36-45 |
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-Butyl-3-methylimidazolium methyl sulfate used for?
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1-Butyl-3-methylimidazolium methyl sulfate is primarily used in chemical synthesis as a Basionic Ionic Liquid. It is suitable for specialty synthesis and research applications.
What are the CAS number and formula for 1-Butyl-3-methylimidazolium methyl sulfate?
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The CAS number for 1-Butyl-3-methylimidazolium methyl sulfate is 401788-98-5, and its empirical formula is C9H18N2O4S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1-Butyl-3-methylimidazolium methyl sulfate with an assay of ≥97.0% (HPLC). We do not represent this product as USP, BP, or EP grade.
How should 1-Butyl-3-methylimidazolium methyl sulfate be handled?
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1-Butyl-3-methylimidazolium methyl sulfate is classified as Danger with hazard statement H314 (Causes severe skin burns and eye damage). Appropriate personal protective equipment, including face shields, gloves, and suitable respirators, is essential. Handle in a well-ventilated area and seek immediate medical attention if exposure occurs.
Is 1-Butyl-3-methylimidazolium methyl sulfate shipped internationally?
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Yes, Tech Serve Solutions exports and supplies 1-Butyl-3-methylimidazolium methyl sulfate globally to research institutions and industrial clients.
How can I request a quote or sample?
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To request a quote or sample of 1-Butyl-3-methylimidazolium methyl sulfate, please contact our sales team through the website or by phone.
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