Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 200-839-4 | CAS number: 75-10-5
- 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
Additional information on environmental fate and behaviour
Administrative data
- Endpoint:
- additional information on environmental fate and behaviour
- Type of information:
- other: overview
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Several experimental studies, published in peer reviewed literature, notable limitations in design and/or reporting, but adequate for assessment
Data source
Referenceopen allclose all
- Reference Type:
- publication
- Title:
- Atmospheric chemical reactivity and ozone-forming potentials of potential CFC replacements
- Author:
- Hayman GD and Derwent RG
- Year:
- 1 997
- Bibliographic source:
- Environmental Science and Technology 31, 327-336
- Reference Type:
- publication
- Title:
- A global three-dimensional study of the fate of HCFCs and HFC-134a in the troposphere
- Author:
- Kanakidou M, Dentener FJ, Crutzen PJ
- Year:
- 1 995
- Bibliographic source:
- Journal of Geophysical research. Vol.100:18781-18801
- Reference Type:
- publication
- Title:
- Kinetic and Mechanisms for the reactions of halogenated organic compounds in the troposphere. Commission of the European Communities and Alternative Fluorocarbons Environmental Acceptability Study
- Author:
- AFEAS
- Year:
- 1 993
- Bibliographic source:
- STEP-HALOCSIDE/AFEAS workshop, Dublin 23-25 March 1993
- Reference Type:
- review article or handbook
- Title:
- Unnamed
- Year:
- 1 989
- Reference Type:
- review article or handbook
- Title:
- Unnamed
- Year:
- 1 991
- Reference Type:
- review article or handbook
- Title:
- Unnamed
- Year:
- 1 998
Materials and methods
Test material
- Reference substance name:
- Difluoromethane
- EC Number:
- 200-839-4
- EC Name:
- Difluoromethane
- Cas Number:
- 75-10-5
- Molecular formula:
- CH2F2
- IUPAC Name:
- difluoromethane
Constituent 1
Results and discussion
Any other information on results incl. tables
No remarks
Applicant's summary and conclusion
- Conclusions:
- Because of its low reactivity with OH, HFC-32 will not contribute significantly to the formation of ground ozone (Hayman et al. 1997).
Degradation in % (for indirect photolysis): = 50 after 3.4 year - Executive summary:
Summaries of studies
The atmospheric degradation of HFCs has been extensively studied through different research programs from industry (AFEAS) and from EU (Step Halocside project) (STEP-HALOCSIDE/AFEAS, 1993) and were reported in the different WMO-UNEP scientific assessments on stratospheric ozone. (WMO 1989,1991).
HFC-32 will degrade into C(=O)F2 as an intermediate product, which will be ultimately converted to HF and CO2 by hydrolysis in atmospheric water. By analogy with phosgene, the atmospheric lifetime of C(=O)F2 by wet removal can be estimated at 70 days (or a ½ life of 48.5 days) as an average value (WMO 1998). In a 3 dimensions atmospheric model calculation (Kanakidou et al, 1995), it was estimated that the abundance of the degradation products would be about 1% of the parent compound. It has also been shown that the flux of F- produced by the tropospheric degradation of HCFC and HFC would be negligible in comparison with the natural burden and fluxes of F- anion in the environment. (WMO 1989)
Because of its low reactivity with OH, HFC-32 will not contribute significantly to the formation of ground ozone (Hayman et al. 1997).
Degradation in % (for indirect photolysis): = 50 after 3.4 year
Degradation products:
Carbon dioxide (CAS No. 124-38-9)
Carbonyl difluoride (CAS No. 353-50-4)
Hydrogen fluoride (CAS No. 7664-39-3)
References
- Hayman GD and Derwent RG (1997) Atmospheric chemical reactivity and ozone-forming potentials of potential CFC replacements, Environmental Science and Technology 31, 327-336.
- Kanakidou M, Dentener FJ, Crutzen PJ(1995)A global three-dimensional study of the fate of HCFCs and HFC-134a in the troposphere.Journal of Geophysical research. Vol.100, pp 18781-18801.
- STEP-HALOCSIDE/AFEAS workshop, Dublin 23-25 March 1993. Kinetic and Mechanisms for the reactions of halogenated organic compounds in the troposphere. Commission of the European Communities and Alternative Fluorocarbons Environmental Acceptability Study.
- WMO 1989, Global ozone research monitoring project- report N°20. Scientific Assessment of stratospheric Ozone, Vol II.
- WMO 1991, Global ozone research monitoring project- report N°25. Scientific Assessment of ozone depletion: 1991.
- WMO 1998, Global ozone research monitoring project- report N°44. Scientific Assessment of ozone depletion: 1998.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.