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EC number: 200-891-8 | CAS number: 75-68-3
- 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
Endpoint summary
Administrative data
Description of key information
Additional information
Based on its physico-chemical properties, the air compartment is the preferred target one for 1-chloro -1,1- difluoroethane. The global atmospheric lifetime of 142b is 18.5 years corresponding to a 1/2 -lifetime of 12.8 years. The tropospheric lifetime due to removal by reaction with OH is 19.5 years. Atmospheric degradation products are essentially the aldehyde form of 142b which further degrades to form CF2(=O) which will hydrolyse in atmospheric water to form HF and CO2.
The ozone depletion potential (ODP) of 1-chloro -1,1-difluoroethane is the main concern of this substance. Due to its ODP value of 0.065, it is considered as an ozone depleting substance. The calculated Global Warming Potential of 1-chloro-1,1-difluoroethane is 1,800 for an integration horizon of 100 years. Its contribution to the Greenhouse effect is small i.e. 0.00108 W/m2.
Indeed, the contribution to the greenhouse effect can be calculated by multiplying quantities emitted to the atmosphere of a substance by its global warming potential (GWP). The global warming potential is calculated by comparing the integrated radiative forcing on a period of 100 years due to 1 kg of a substance emitted to the atmosphere with a similar calculation done with CO2 which is the accepted reference. (IPCC 1990, 1995) The result is expressed in GWP/tonnes.
Contribution from atmospheric concentration in 1992: 0.00108 W/m2 has to be compared with 1.52 w/m2for CO2 (value from IPCC 1995)
GWP (100) = 1800 (IPCC 1995)
Production of 142b in 1996 = 38 Kt (AFEAS, 1996)
Contribution of 142b to global warming:
6.8 107 GWP.tonnes to be compared with 2.6 1010 GWP.tonnes for CO2 (IPCC 1995)
GWP values from IPCC 1995 are the accepted values for the Kyoto Protocol (Décision 2/CP.3 Methodological issues related to the Kyoto Protocol, FCCC/CP/1997/7/Add.1)
It is not expected to bioaccumulate (log Kow= 1.64 - 2.05). Overall, abiotic degradation of 1 -chloro-1,1 -difluoroethane occurs very slowly. The half life in air is estimated at 4860 days and in water a half life of 16,000 years is determined. 1 -Chloro-1,1-difluoroethane was not found to be ready biodegradable in a screening test (5% after 28 days). Simulation studies were not performed.
Any 1-chloro-1,1-difluoroethane which might be present in aqueous waste streams discharged directly into rivers and lakes would be expected to have a half-life of days or at the very most a few weeks. 1-chloro-1,1-difluoroethane present in surface or ground waters would have little tendency to partition onto solids as the log Kow is 1.6 - 2.05, indicating little potential for accumulation in soil.The sediment and soil simulation tests don't need to be conducted as the substance is a gas and has a low potential for adsorption (log Kow 2.05); it is expected that direct and indirect exposure of soil and sediment is therefore unlikely.
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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