0102030405
0102030405
High Purity Propyne Gas (C3H4) Fluorocarbon Gases
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Contact usSpecifications
| Test | Result | Units | Specification | Method |
| Purity | 99.4 | area% | 99.0%max | QC-119 |
| Propane | <0.0 | area% | Report | QC-119 |
| Propene | <0.0 | area% | 1.0%max | QC-119 |
| Cyclopropane | <0.0 | area% | Report | QC-119 |
| n-Butane | <0.0 | area% | Report | QC-119 |
| Appearance | Pass | Colorless gas | QC-515 | |
| Inhibitor | 0.01%BHT |
Technical Information
| Chemical formula | C3H4 |
| Molar mass | 40.0639 g/mol |
| Appearance | Colorless gas[2] |
| Odor | Sweet[2] |
| Density | 0.53 g/cm3 |
| Melting point | −102.7 °C (−152.9 °F; 170.5 K) |
| Boiling point | −23.2 °C (−9.8 °F; 250.0 K) |
| Vapor pressure | 5.2 atm (20°C)[2] |
product description
Propyne (methylacetylene) is an alkyne with the chemical formula CH3C≡CH. It is a component of MAPD gas—along with its isomer propadiene (allene), which was commonly used in gas welding. Unlike acetylene, propyne can be safely condensed.
European space companies have researched using light hydrocarbons with liquid oxygen, a relatively high performing liquid rocket propellant combination that would also be less toxic than the commonly used MMH/NTO (monomethylhydrazine/nitrogen tetroxide). Their research showed[citation needed] that propyne would be highly advantageous as a rocket fuel for craft intended for low Earth orbital operations. They reached this conclusion based upon a specific impulse expected to reach 370 s with oxygen as the oxidizer, a high density and power density—and the moderate boiling point, which makes the chemical easier to store than cryogenic fuels that must be kept at extremely low temperatures.
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