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Dimethylacetylene (2 butyne)


Dimethylacetylene is filled from bulk raw material sourced from a preferred partner and analysed to ensure compliance to our published specification.

Standard Specifications

Purity / Assay
Impurities (Mol %)
1 butene < 0.25
2 butenes < 0.25
1,2 butadiene < 0.25
1 butyne < 1.0
Total Impurities < 2

Please contact us if the specification you require is not shown above. AGT International is able to custom manufacture different specifications according to your requirements.


Standard Cylinder Sizes and Fill Volumes

Cylinder Information
Cylinder Size Fill Volume (kg)
L15 Up to 20
L05 Up to 5
L01 Up to 2

* Dip tube available for liquid withdrawal

If you require a different container size please contact us.


Technical Information

Technical Data Shipping Information
Molecular Weight (g/mol) 54.09 Shipping Name 2-butyne
Liquid Density (kg/m³)   Hazard Class 2.1
Gas Density (kg/m³)   UN No. UN 1144
Boiling point (°C) 26.95 Hazard Label Flammable Gas
Specific Volume (m³/kg)   CAS No. 503-17-3
Vapour Pressure (bar.a @ 20°C) 0.79  
Valve Outlet CGA 510 / BS 4