Identifiers for search
| Name | CFC-113 (Trichlorotrifluoroethane) |
| Formula | C₂Cl₃F₃ |
| IUPAC name | 1,1,2-trichloro-1,2,2-trifluoroethane |
| CAS number | 76-13-1 |
| EC number | 200-936-1 |
| UN number | 3082 — Environmentally hazardous substances, liquid, n.o.s. |
| Transport class (ADR/RID) | 9 (Miscellaneous items and materials) |
| PubChem CID | 6428 |
| Synonyms | CFC-113, Chlorofluorocarbon-113, Freon® 113, Genetron® 113, Halocarbon 113, Refrigerant 113 |
Physical & chemical properties
| Molar mass | 187.38 g/mol |
| Boiling point (1 atm) | 47 °C |
| Melting point | -35 °C |
| Critical temperature | 214.1 °C |
| Critical pressure | 33.8 bar |
| Vapour pressure | 0.36 bar at 20 °C |
| Gas density | 7.79 kg/m³ (20 °C, 1 bar (ideal gas, M/24.04; liquid at 20 °C)) |
| Relative density (air = 1) | 6.47 |
| Solubility in water | 0,17 g/l at 20 °C |
| Appearance | colourless, In low concentration odourless, in higher concentrations sweetish odour. |
| Odour | In low concentration odourless, in higher concentrations sweetish odour. |
| 1 ppm at 20 °C | 7.79 mg/m³ |
Behaviour with temperature and pressure
Boiling point 47 °C at 1 atm: a liquid at room temperature; vapour is the measured phase. Critical point 214.1 °C / 33.8 bar: below this temperature it can be stored as a liquid; cylinder pressure then equals the vapour pressure. Vapour pressure ≈ 0.36 bar at 20 °C — this is the pressure inside a cylinder or a switchgear compartment at that temperature, and it rises steeply with temperature (Clausius–Clapeyron). Relative density 6.47 (air = 1): heavier than air — accumulates in pits, cable basements and at floor level; place sensors low. Conversion at 20 °C, 1013 mbar: 1 ppm = 7.79 mg/m³; NDIR reads partial pressure, so readings scale with absolute pressure (value = reading × P/1013) and must be pressure-compensated.
// Combustible substance, poorly flammable., Very slightly soluble in water., Highly volatile., The substance is hazardous to the aquatic environment., The substance is hazardous to the ozone layer., Acute or chronic health hazards result from the substance.
Hazards & safety
NFPA 704
health · flammability · instability · special
GHS / CLP pictograms
| Hazard class | asphyxiant; ozone-depleting + greenhouse gas (CFC) |
| GHS signal word | Warning |
| CLP classification | Eye irritation, Category 2; H319 Hazardous to the aquatic environment, Chronic Category 2; H411 Hazardous to the ozone layer, Category 1; H420 |
| Hazard statements | H319: Causes serious eye irritation. H411: Toxic to aquatic life with long lasting effects. H420: Harms public health and the environment by destroying ozone in the upperatmosphere |
| Lower / upper explosion limit | non-flammable |
| Auto-ignition temperature | 680 °C · T1 |
| Seveso III named substance | yes |
Exposure limits
| EU indicative OELV (8 h TWA) | no EU IOELV |
| EU IOELV short-term (15 min) | — |
| Germany AGW (TRGS 900) | 500 ppm · 3900 mg/m³ |
| Netherlands | wettelijke grenswaarde per Arboregeling bijlage XIII — SER grenswaarden database |
| NIOSH REL (USA) | TWA 1000 ppm (7600 mg/m3) ST 1250 ppm (9500 mg/m3) |
| OSHA PEL (USA) | TWA 1000 ppm (7600 mg/m3) See Appendix G |
| IDLH | 2000 ppm |
// Limits change: always confirm the current national value before setting an alarm. Values above were read from the EU directives / GESTIS / NIOSH pages listed in Sources.
Effect on people
Low acute toxicity; CNS depression and cardiac sensitisation at high concentration (IDLH 2000 ppm); solvent — defats skin. Decomposes to HF/HCl/phosgene when heated.
GESTIS main toxic effects: Acute effects:
In case of high concentrations: disorders of the heart function, weak narcotic potential, risk of suffocation due to oxygen displacement;
Chronic effects:
Sufficient data are not available.
Recommended monitoring
- NDIR (9 µm) for legacy solvent/refrigerant areas; largely historical (CFC production banned).
- IOELV-equivalent practice 1000 ppm TWA.
Climate & atmosphere
| GWP₁₀₀ — IPCC AR6 | 6520 |
| GWP₁₀₀ — IPCC AR4 | 6130 |
| GWP used in Reg. (EU) 2024/573 | not listed |
| Atmospheric lifetime | 93 years |
| Ozone depletion potential | — |
| Main IR absorption band (NDIR) | 9.0–9.5 µm (C–F); 11.5–12.0 µm (C–Cl); 8.2 µm |
| Note | CFC-113 is a Montreal Protocol Annex A substance (ODP 0.8 per Protocol tables); production banned; covered by ODS Regulation (EU) 2024/590. |
Regulation windows
- ODS Regulation (EU) 2024/590 — CFC, banned
- Workplace practice 1000 ppm
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Other gases
Sources
- https://gestis-database.dguv.de/data?name=031730
- https://www.cdc.gov/niosh/npg/npgd0632.html
- https://pubchem.ncbi.nlm.nih.gov/compound/6428
- IPCC AR6 WG1 Ch.7 Supplementary Material, Table 7.SM.7 (https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Chapter07_SM.pdf)
- IPCC AR4 WG1 Ch.2, Table 2.14 (https://www.ipcc.ch/site/assets/uploads/2018/02/ar4-wg1-chapter2-1.pdf)
- HITRAN/NIST IR band positions (approximate centre of the strongest band used for NDIR; https://hitran.org, https://webbook.nist.gov)
- PubChem CID 6428 (ICSC: 36 kPa at 20 °C; HSDB vapour density 6.5); critical point 214.1 °C / 33.79 bar per NIST Chemistry WebBook (https://webbook.nist.gov/cgi/cbook.cgi?ID=C76131&Mask=4)
// Data compiled 2026-09-17 from the listed primary sources; null values were left blank rather than estimated.