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Diss Factsheets
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EC number: 200-893-9 | CAS number: 75-71-8
- 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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Other distribution data
Administrative data
- Endpoint:
- other distribution data
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- supporting study
- Study period:
- Not specified
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Remarks:
- Taken from publically available data, and is considered accurate based on the registrants experience of the substance
Data source
Reference
- Reference Type:
- publication
- Title:
- Unnamed
- Year:
- 1 979
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- GLP compliance:
- not specified
- Type of study:
- other: Oxidation in the troposphere / stratosphere
- Media:
- other: Not specified
Test material
- Reference substance name:
- Dichlorodifluoromethane
- EC Number:
- 200-893-9
- EC Name:
- Dichlorodifluoromethane
- Cas Number:
- 75-71-8
- Molecular formula:
- CCl2F2
- IUPAC Name:
- dichlorodifluoromethane
- Test material form:
- not specified
- Details on test material:
- CAS NO. 75-71—8
TSL NO. PA 82000
Alternate Names: Fluorocarbon-12, Freon-12
Molecular weight: 129.91 (Weast 1977)
Melting point: -158°C (Weast 1977)
Boiling point at 760 torr: -29.8°C (Weast 1977)
Vapour pressure at 20°C: 4306 torr (Pearson and McConnell 1975)
Solubility in water at 25°C: 280 mg/l (Pearson and McConnell 1975)
Log octanol/water partition coefficient: 2.16 (Hansch et al. 1975)
Constituent 1
Results and discussion
Any other information on results incl. tables
No information was found pertaining to the oxidation of dichlorodifluoromethane in the aquatic environment under ambient conditions. In addition, dichlorodifluoromethane is known to be relatively stable with respect to attack by hydroxyl radicals present in the troposphere (Environmental Protection agency 1975; Hanst 1978; Lillian et al. 1975; Cox et al. 1976;Howard et al. 1975; Howard and Durkin 1973). For instance, the bimolecular rate of reaction for dichlorodifluoromethane with hydroxyl radicals is less than 1 x 10-16cm3sec-1with a corresponding lifetime (time for reduction to l / e of the original concentration) of greater than 330 years (Cox et al. 1976). According to Howard et al. (1975), fluorocarbon compounds are highly resistant to attack by conventional oxidising agents at temperature below 200°C.
Assuming a troposphere-to-stratosphere turnover time (time for all but 1 / e of tropospheric air to diffuse into the stratosphere) of 30 years, a tropospheric lifetime of 30 years would result in over 90 percent of tropospheric dichlorodifluoromethane eventually reaching the stratosphere. Jesson et al. (1977) and Sze and Wu (1976) have postulated a shorter tropospheric lifetime, on the order of 20 years, based on analysis of the data of other workers in the field, but no known destructive mechanisms in the troposphere (sinks) are identified as being capable of removing dichlorodifluoromethane. A tropospheric lifetime of 20 years would indicate that about 40 per cent of tropospheric dichlorodifluoromethane would reach the stratosphere.
Applicant's summary and conclusion
- Conclusions:
- Dichlorodifluoromethane introduced into aqueous systems will most likely volatize to the atmosphere. Once in the troposphere, dichlorodifluoromethane remains stable. It eventually diffuses into the stratosphere or is carried back to the earth during the precipitation process. Based on the information found it appears that oxidation is not an important fate process for dichlorodifluoromethane in the aquatic environment.
- Executive summary:
Dichlorodifluoromethane introduced into aqueous systems will most likely volatize to the atmosphere. Once in the troposphere, dichlorodifluoromethane remains stable. It eventually diffuses into the stratosphere or is carried back to the earth during the precipitation process. Based on the information found it appears that oxidation is not an important fate process for dichlorodifluoromethane in the aquatic environment.
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.
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