POLYMER MONOMER
Isobutene (Isobutylene)
Gaseous monomer for butyl rubber, polyisobutylene, and MTBE production.
Request product samples delivered within 2–4 weeks. Verify quality and compliance before bulk procurement.
Quick Reference
Quick Reference
| Product Name | Isobutene (Isobutylene) |
| CAS Number | 115-11-7 |
| Molecular Formula | C₄H₈ |
| Molecular Weight | 56.11 g/mol |
| Purity | ≥99% |
| Appearance | Colorless gas (liquefied under pressure) |
| Density | 0.594 g/cm³ (liquid, -6.9 °C) |
| Boiling Point | -6.9 °C |
| Melting Point | -140.4 °C |
| Flash Point | -76 °C |
| Solubility | Practically insoluble |
| Shelf Life | Indefinite when stored in sealed pressurized vessels |
Overview
Isobutene (Isobutylene)
Isobutene (isobutylene) is a colorless, flammable gas at room temperature and a fundamental C4 building block in the petrochemical industry. It is the primary monomer for butyl rubber (IIR) and polyisobutylene (PIB) production, and a key feedstock for MTBE, ETBE, and other fuel additives. High-purity isobutene (≥99%) is essential for specialty polymer applications including reactive polyisobutylene used in fuel and lubricant additives. It is shipped under pressure as a liquefied gas.
Key Benefits
Key Benefits
High purity ≥99% for specialty polymer applications
Key monomer for butyl rubber and polyisobutylene
Essential feedstock for MTBE and fuel additives
Reliable supply from major Chinese petrochemical producers
Full documentation
COA, MSDS, batch traceability
Applications
Applications
1
Rubber & Elastomers
Primary monomer for butyl rubber (IIR) and halogenated butyl rubber production, used in tire inner liners and pharmaceutical stoppers.
2
Polymer & Lubricant Additives
Feedstock for polyisobutylene (PIB) and reactive PIB, used as viscosity modifiers, dispersants, and fuel additives.
3
Fuel & Petrochemical
Raw material for MTBE, ETBE, and other oxygenate fuel additives to boost octane ratings.
4
Fine Chemical Synthesis
Building block for tert-butyl-containing compounds, antioxidants (BHT), and specialty chemicals.
Technical Specifications
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Appearance | Colorless gas (liquefied under pressure) | - |
| Molecular Formula | C₄H₈ | - |
| Molecular Weight | 56.11 | g/mol |
| Purity | ≥99 | % |
| Density (liquid, -6.9 °C) | 0.594 | g/cm³ |
| Boiling Point | -6.9 | °C |
| Melting Point | -140.4 | °C |
| Flash Point | -76 | °C |
| Solubility in Water | Practically insoluble (0.0263 g/100 mL at 25 °C) | - |
| Vapor Pressure (21 °C) | 275 | kPa |
| Auto-Ignition Temperature | 465 | °C |
Packaging & Shipping
Packaging & Shipping
Packaging
Pressurized Cylinder - Various
ISO Tank (pressurized) - 20-22 MT
Bulk Pipeline - Continuous supply
Shipping & Storage
Hazardous: Yes - DG transport required
Lead Time: 2-4 weeks from order confirmation
Storage: Store in pressurized vessels in cool, well-ventilated areas away from ignition sources. Keep away from oxidizers. Follow applicable pressure vessel regulations.
Shelf Life: Indefinite when stored in sealed pressurized vessels
Documentation
Documentation
TDS and MSDS available on request
Documents will be emailed within 24 hours of your request
FAQ
Frequently Asked Questions
Related Products
Related Products
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