Made by the action of water on calcium carbide. Used for welding as the flame temperature is roughly 3300°C when burnt with oxygen.
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| Density | 1.173 at STP 610 at 193K | kgm-3 | Clip |
| Boiling Point | 189 | K | Clip |
| Specific heat capacity | 1590 | Jkg-1K-1 | Clip |
| Ratio of Specific Heats | 1.26 | | Clip |
| Thermal conductivity | 0.0184 at STP | Wm-1K-1 | Clip |
| Refractivity | 0.000606 | | Clip |
| Viscosity | 0.00000935 | Nsm-2 | Clip |
| Critical Temperature | 309 | K | Clip |
| Critical Pressure | 6140000 | Pa | Clip |
| Critical Volume | 0.000113 | m3mol-1 | Clip |

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