Butyl ethyl ether
Butyl ethyl ether (CAS: 628-81-9), with the linear formula CH3(CH2)3OC2H5, is a clear, colourless liquid. This ether possesses a molecular weight of 102.17 g/mol. It is commonly utilised as a solvent in various chemical syntheses and as a building block in organic chemistry. Its properties make it suitable for applications requiring a moderately volatile organic solvent with good solvency power for many organic compounds.

Solvent in Organic Synthesis
Butyl ethyl ether serves as a versatile solvent in numerous organic reactions. Its moderate polarity and volatility allow for effective dissolution of reactants and facilitate reaction control in processes such as Grignard reactions and other organometallic chemistry.
Chemical Intermediate
As an organic building block, this ether can be employed in the synthesis of more complex molecules. It is a valuable component in multi-step synthetic routes within the pharmaceutical and fine chemical industries.
Research and Development
In laboratory settings, Butyl ethyl ether is used for research purposes, including method development and small-scale synthesis. Its predictable behaviour and established chemical properties make it a reliable choice for experimental work.
| Molecular weight | 102.17 |
|---|---|
| Linear formula | CH3(CH2)3OC2H5 |
| Assay | 99% |
| Grade | purum |
| Boiling point | 91-92 °C(lit.) |
| Density | 0.75 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.382(lit.) |
| Melting point | −124 °C(lit.) |
| Vapour pressure | 52 mmHg (25 °C) |


Hazard statements
- H225Highly flammable liquid and vapour
- H302Harmful if swallowed
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | -1 °C / 30.2 °F |
| Transport (UN / ADR) | UN 1179 3 / PGII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | F,Xn |
| Risk statements (R) | 11-22 |
| Safety statements (S) | 16-23 |
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 Butyl ethyl ether primarily used for?
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Butyl ethyl ether is primarily used as a solvent in organic synthesis and as an intermediate in chemical manufacturing and research.
What are the CAS number and chemical formula for Butyl ethyl ether?
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The CAS number for Butyl ethyl ether is 628-81-9, and its chemical formula is CH3(CH2)3OC2H5.
What grade and purity does Tech Serve Solutions supply for Butyl ethyl ether?
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Tech Serve Solutions supplies Butyl ethyl ether with a purity of 99% (purum grade). We do not represent this product as USP, BP, or EP grade.
How should Butyl ethyl ether be handled safely?
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Butyl ethyl ether is a highly flammable liquid and vapour (H225) and is harmful if swallowed (H302). Handle it in a well-ventilated area, away from ignition sources, and wear appropriate personal protective equipment including eyeshields and gloves.
How is Butyl ethyl ether packed and shipped?
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Butyl ethyl ether is packed according to industry standards for flammable liquids and is exported globally by Tech Serve Solutions.
How can I request a quote or sample for Butyl ethyl ether?
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To request a quote or sample, please contact our sales team through the website or by phone, providing the product name and CAS number (628-81-9).
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