PETROX - gasous mixture of ethylene oxide and carbon dioxide
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Characteristics
The mixture, when released from the application cylinder to the atmosphere, is a colourless, toxic and flammable gas of a pleasant, etheric odour. Its toxicity is utilised in the process of sterilisation of medical utensils just after their production. The mixture is produced at our Olefins Expedition unit. The production process involves saturation of liquid ethylene oxide with gaseous carbon dioxide directly in the cylinder supplied by the customer. The process is carried out on a special automatic balance which guarantees achieving the desired composition of the mixture.
Applications
The mixture is used for low-temperature sterilisation (at room temperature) of syringes, needles, plastic tubes and similar items made, in part or in whole, of plastics, at the manufacturer's premises.
Properties
| Molar mass: |
44.05 |
| State of matter at 20°C: |
gas |
| Colour: |
colourless |
| Odour: |
pleasant, etheric |
| Melting point (at 1013 hPa): |
–112.5 °C |
| Boiling point (at 1013 hPa): |
10.73 °C |
| Critical temperature: |
195.8 °C |
| Flash point: |
n/a – gas |
| Autoignition temperature: |
430°C |
Explosive limits of mixture with air:
- lower
- upper |
2.6% by volume
100% by volume |
| Stoichiometric concentration: |
7.75% by volume |
| Heat of vaporisation (10,7°C; 1013 hPa): |
579.9 J/g |
| Heat of combustion: |
29.7 kJ/g |
| Minimum energy of ignition in air: |
0.06 mJ |
| Gas density (10.7°C; 1013 hPa): |
1.9 g/dm3 |
| Gas density relative to air: |
1.52 |
| Liquid density (6°C): |
0.89 g/cm3 |
| Vapour pressure at 20°C: |
0.15 Mpa |
| Solubility in water: |
Soluble without limitations |
| Solubility in other solvents: |
Soluble without limitations in acetone, benzene, ethyl ether, methanol, carbon tetrachloride |
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