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Diss Factsheets
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EC number: 206-534-2 | CAS number: 353-50-4
- 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
Hydrolysis
Administrative data
- Endpoint:
- hydrolysis
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- documentation insufficient for assessment
Data source
Reference
- Reference Type:
- publication
- Title:
- Pyrolysis products of polytetrafluoroethylene and polyfluoroethylenepropylene with reference to inhalation toxicity
- Author:
- Arito H, and Soda R.
- Year:
- 1 977
- Bibliographic source:
- Ann. Occup. Hyg. 20:247-255
Materials and methods
- Principles of method if other than guideline:
- - Principle of test:
analysis of the pyrolysis products of polytetraflyoroethylene (PTFE) or polyfluoroethylepropylene (PFEP)
- Short description of test conditions: polytetraflyoroethylene or polyfluoroethylepropylene were submitted to high temperatures, in dry air stream, dry nitrogene, wet air and wet nitrogen streams
- Parameters analysed / observed: analysis of the pyrolysis products (qualitative) - GLP compliance:
- no
- Remarks:
- Prior to GLP standards
Results and discussion
Any other information on results incl. tables
Pyrolysis in the nitrogen stream (dry or humid)
- PTFE at 500 -650°C: main products identified were tetrafluoroethylene, hexafluoropropylene, octafluorocyclobutane
- PTFE at 450°C: main products were tetrafluoroethylene, hexafluoropropylene
- PFEP at 400°C: main products were tetrafluoroethylene, hexafluoropropylene
Pyrolysis in the air stream:
Carbonyl fluoride was a main pyrolysis product of PTFE in dry air stream.
Other bands appeared in the IR spectra, corresponding to carbon tetrafluoride, hexafluoroethane, and silicon tetrafluoride.
Trifluoroacetylfluoride was identified in the pyrolysis products of PTFE and PFEP in the air stream.
With both compounds, in the humid air stream, CO2 was of greater intensity in IR spectra, while carbonyl fluoride decreased significantly at 550°C and disappeared at 500°C. Acidic droplets present in the wet air stream were analysed following precipitation and identified as trifluoroacetyl fluoride.
The results support the following reaction of pyrolysis products containing COF2 and trifluoroacetyl fluoride with the humid air:
COF2 + H2O ----> CO2 + 2HF
CF3COF + H2O ---> CF3COOH + HF
Applicant's summary and conclusion
- Conclusions:
- Analysis of pyrolysis products from PTFE and PFEP under various conditions showed that carbonyl fluoride was one of the main pyrolysis products in oxidative pyrolysis. In the presence of humid air, increase in carbon dioxide and decrease in carbonyl fluoride indicated reaction of carbonyl fluoride with water to form CO2 and hydrogen fluoride.
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