Fire fighting agents
Refrigerant 23 (Trifluoromethane)
Synonyms: Trifluoromethane; R-23; Hydrofluorocarbon 23; HFC23; Fluoroform.
CAS No.: 75-46-7
EC No.: 200-872-4
Molecular Formula: CHF3
Physical Properties:
| Molar mass | g/mol | 70,01 |
| Boiling Point | °C | -82.1 |
| Melting Point | °C | -155.2 |
| Vapor Pressure | MPa | 4.38 |
| Density | kg/m3 | 2.946 |
| Solubility in water | g/L | 1 |
| Solubility in organic solvents | Soluble | |
| ODP | 0 | |
| GWP | 12000 |
Use:
1) HFC-23 is used as refrigerant, sometimes as a replacement for CFC-13.
2) It’s used in semiconductor industry, in plasma etching of silicon oxide and silicon nitride.
3) It’s used as a total flooding fire extinguishing agent.
4) It’s used in very low temperature refrigeration systems, typically on the low stage of multi-stage systems. R-23 has properties similar to R-13 and can be used as replacement R-13 in existing systems. R-23 has higher discharge temperatures than R-13, that’s why this gas should be used to equipments without temperature working limits. Polyester (POE) lubricants should be used to charge hydrocarbon oil additives to ensure proper oil return.
Quality standards:
| HFC-23 purity, % | 99.5. |
| Moisture | 10 ppm |
| Non-volatile residues, % | 0.001 |
| Acidity | 1 ppm |
| Odor | Odorless |
| NAG (Vol.), % | 1.5 |
| Appearance | colorless and transparent |
Standard Packaging:
• steel cylinder, 9 kg;
• steel cylinder, 30 kg;
• Isotank.
Risks and Safety Information
HFC-23 is regulated by UN as non-flammable, compressed gas. Green house gas with GWP 12000.