Acetylene is the chemical compound with the formula C2H2. Acetylene sometimes also referred as DA Gas. It is a hydrocarbon and the simplest alkyne. This colorless gas is widely used as a fuel and a chemical building block. It is unstable in its pure form and thus is usually handled as a solution. Pure acetylene is odorless, but commercial grades usually have a marked odor due to impurities.
Acetylene produces highest known flame temperature when mixed with Oxygen. Commercially, it is produced by reaction of Calcium Carbide with water. The Acetylene is highly unstable in nature and needs to be dissolved in a solvent called Acetone or DMF. Because of its highly unstable nature, Acetylene is always stored in Acetylene gas cylinders already saturated with required quantity of solvent.
Main application of DA Gas in industry is for metal cutting / welding / brazing purpose, also use as a lighting lamp in mines and caves, use in Atomic Absorption Spectroscopy.
Fine gas produce DA Gas at Karachi facility and can offer DA gas in Cylinders.
Properties of Acetylene
| Chemical formula | C2H2 |
| Molar mass | 26.038 g·mol−1 |
| Appearance | Colorless gas |
| Odor | Odorless |
| Density | 1.1772 g/L = 1.1772 kg/m3 (0 °C, 101.3 kPa) |
| Melting point | −80.8 °C (−113.4 °F; 192.3 K) Triple point at 1.27 atm |
| Sublimation conditions | −84 °C; −119 °F; 189 K (1 atm) |
| Solubility in water | slightly soluble |
| Solubility | Slightly soluble in alcohol soluble in acetone, benzene |
| Vapor pressure | 44.2 atm (20°C) |
| Acidity (pKa) | 25 |
| Conjugate acid | Ethynium |
| Magnetic susceptibility (χ) | −20.8×10−6 cm3/mol |
| Thermal conductivity | 21.4 mW·m−1·K−1 (300 K) |
