1-Butene
1-Butene (CAS: 106-98-9), a linear alpha-olefin with the formula CH2=CHCH2CH3 and a molecular weight of 56.11 g/mol, is a highly flammable gas. It serves as a crucial building block in organic synthesis and is widely employed in the production of polymers, particularly as a co-monomer in polyethylene. Its specific properties also lend themselves to applications in specialty gas mixtures and as a reagent in various chemical processes. TSS supplies 1-Butene with an assay of ≥99%.

Polymer Production
1-Butene is extensively used as a co-monomer in the production of polyethylene, especially linear low-density polyethylene (LLDPE). Its incorporation modifies polymer properties, enhancing flexibility and tear strength.
Organic Synthesis
As a reactive olefin, 1-Butene is a valuable intermediate in various organic synthesis pathways. It participates in addition reactions and can be functionalized to produce a range of downstream chemicals.
Specialty Gases
Due to its specific chemical characteristics, 1-Butene is utilized in the formulation of specialty gas mixtures for research, calibration, and industrial applications where precise gas compositions are required.
| Molecular weight | 56.11 |
|---|---|
| Linear formula | CH2=CHCH2CH3 |
| Assay | ≥99% |
| Boiling point | −6.3 °C(lit.) |
| Vapour pressure | 1939 mmHg (21.1 °C) |
| Vapour density | 1.93 (vs air) |
| Autoignition temp | 723 °F |
| Melting point | −185 °C(lit.) |


Hazard statements
- H220Extremely flammable gas
- H280Contains gas under pressure; may explode if heated
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P410Protect from sunlight
| Flash point | -80 °C / -112 °F |
|---|---|
| Transport (UN / ADR) | UN 1012 2.1 |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F+ |
| Risk statements (R) | 12 |
| Safety statements (S) | 9-16-33 |
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-Butene used for?
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1-Butene is primarily used as a co-monomer in the production of polyethylene (e.g., LLDPE), as an intermediate in organic synthesis, and in specialty gas applications.
What are the CAS number and formula for 1-Butene?
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1-Butene has the CAS number 106-98-9 and the linear formula CH2=CHCH2CH3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1-Butene with an assay of ≥99%. We do not represent this product as meeting USP, BP, or EP pharmacopoeial standards.
How should 1-Butene be handled safely?
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1-Butene is extremely flammable and can cause harm if inhaled. It requires handling in well-ventilated areas, away from ignition sources, and with appropriate personal protective equipment. Refer to the safety data sheet for comprehensive handling information.
Is 1-Butene a controlled substance?
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Based on the provided data, 1-Butene (CAS: 106-98-9) is not indicated as a controlled substance.
How is 1-Butene supplied and exported?
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1-Butene is supplied as a gas and TSS can arrange for its export to meet global customer requirements.
How can I request a sample or quote for 1-Butene?
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To request a sample or a quotation for 1-Butene, please contact our sales team via the website or direct email, providing your specific requirements.
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