Buten-3-yne(C4H4)
Specifications
- CAS No.: 689-97-4
- UN No.: 1065
- EINECS No.: 211-713-3
- Molecular Weight: 52.07 g/mol
- Appearance: Colorless
- Melting Point: -118 ℃
- Boiling Point: -5℃
- Density: 0.71kg/m³
- Hazard Class (DOT): 2.1 & 8
- Label: flammable Gas
High-purity buten-3-yne (C₄H₄) gas supplied from China for chemical synthesis, polymer production, and specialty applications.
High-purity buten-3-yne (C₄H₄ / vinyl acetylene) for organic synthesis, polymer manufacturing, and specialty chemical production.
Buten-3-yne, also known as vinyl acetylene, is a colorless, flammable organic compound. As the simplest enyne (a molecule containing both a double and a triple bond), it exhibits unique reactivity due to its conjugated system of carbon-carbon bonds. It is produced commercially by the dimerization of acetylene and serves as an important intermediate in organic synthesis. Buten-3-yne is used in the production of specialty polymers, adhesives, coatings, and various fine chemicals. It is also a key building block for synthesizing more complex organic molecules, typically transported as a liquefied compressed gas.
Global Shipping & Export Compliance
Buten-3-yne (UN 1065) is classified as a flammable compressed gas and must be handled under strict hazardous materials regulations.
- Sea freight (FCL / LCL) – standard export method
- Air freight – limited availability (regulatory controlled)
Required Export Documents
- Material Safety Data Sheet (MSDS)
- Certificate of Analysis (COA)
- Dangerous Goods Declaration (DGD)
- UN-certified cylinder documentation
- Commercial invoice & packing list
How to Order Buten-3-yne Gas from China
- Send technical requirements (purity, cylinder specification, application)
- Receive quotation (EXW / FOB / CIF options)
- Confirm cylinder specification & compliance
- Review COA, MSDS, and certification documents
- Production, filling, and quality inspection
- Hazardous goods shipping arrangement
- Delivery and final inspection at destination
Common Mistakes When Buying Buten-3-yne Gas
- Choosing suppliers only based on lowest price
- Ignoring cylinder certification and pressure rating
- Not verifying purity and impurity levels
- Skipping third-party inspection before shipment
- Overlooking export documentation compliance
- Underestimating safety requirements for reactive gas handling
Packaging
| Gas Cylinder Specifications | Contents | |
|---|---|---|
| Cylinder Capacity | Cylinder Valve | Weight |
| Custom sizes available | Consult for valve options | Consult for fill weights |
Buten-3-yne is typically shipped in specialized cylinders. Please contact us for detailed packaging options and specifications.
Frequently Asked Questions
