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EC number: 206-996-5 | CAS number: 420-46-2
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
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Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Rate constant for OH-mediated photolysis at 25 deg. C is 1.24+/-0.09. From peer reviewed journal (KC=1) Orkin, V.L., Huie, R.E., Kurylo, M.J. (1996) Atmospheric lifetimes of HFC-143a and HFC-245fa: flash photolysis resonance fluorescence measurements of the OH reaction rate constants. J. Phys. Chem. 100, 8907-8912.
Key value for chemical safety assessment
- Half-life in air:
- 9 600 d
Additional information
An overall OH rate constant was calculated to be 9.7x 10-15cm3/molecule-sec, with a half-life of 1108 days (3.04 years). This calculation assumes a 12-hr day and an OH radical concentration of 1.5 x 106OH/cm3(USEPA, 2008a).
Photodegradation occurs primarily with hydroxyl radicals, resulting in a half-life of approximately 9,600 days (Orkin et al., 1996; Hayman and Derwant, 1997 and Naik et al., 2000). A photochemical trajectory model has calculated a photochemical ozone creation potential (POCP) of 0.0 for HFC-143a, thus HFC-143a should make a negligible contribution to photochemical ozone production (Hayman and Derwent, 1997).
A two-dimensional chemical-radiative-transport model of the global atmosphere determined the atmospheric lifetime of 1,1,1,-trifluoroethane to be 47.2 years, compared with 53.5 years as previously reported by Grainer et al., 1999. The difference in values appears to result from the slow, but not trivial loss in the stratosphere. The direct global warming potential (GWP) of HFC-143a at 20-, 100- and 500 year time horizons was calculated to be 5,695, 4,352, and 1,537, respectively (relative to a value of 1 for CO2). The model took into account evaluated atmospheric lifetimes and radiative forcings. The percent difference in GWP for HFC-143a for the 100-year time horizon in this study (4,352) was 19% less than that reported (5,400) by the Grainer et al. (1999) (Naik et al., 2000, U.S. EPA, 2009). In the 4th IPCC assessment report, the GWP over a 100 year time horizon was assessed at 4470 with an atmospheric lifetime of 52 years (4th IPCC assessment report, table 2.14 chapter 2, 2007)
Grainer, C. et al. 1999. Climate effects of ozone and halocarbon changes in Scientific Assessment of Ozone Depletion: 1998, Ch. 10, Rep. 44, pp.383 -416, Global Ozone Res. and Monit. Proj. World Meteorol. Org., Geneva, Switzerland.
Hayman, GD and Derwent, RC, 1997. Atmospheric chemical reacitivity and ozone-forming potentials of potential CFC replacements. Environ. Sci. Technol. 31, 327 -336.
Naik, V., Jain, AK, Patten, KO, and Wuebbles, DJ. 2000. Consistent sets of atmospheric lifetimes and radiative forcings on climate for CFC replacements: HCFCs and HFCs. J. Geophysical Res. 105, (D5), 6903 -6914.
Orkin, VL, Huie, RE, Kurylo, MJ. 1996. Atmospheric lifetimes of HFC-143a and HFC-245fa: Flash photolysis resonance fluoresence measurements of the OH reaction rate constants. J. Phy. Chem., 100, 8907 -8912.
U.S.EPA 2008a. Estimation Programs Interface Suite for Microsoft Windows v. 4.00. United States Environmental Protection Agency, Washington, D.C., USA.
U.S.EPA 2009. Federal Register Vol 74, No. 68, Friday April 10, 2009 p. 16629.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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