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Diss Factsheets
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EC number: 220-877-5 | CAS number: 2923-16-2
- 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
Phototransformation in water
Administrative data
- Endpoint:
- phototransformation in water
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- Not specified
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Study not performed according to international guideline nor under GLP. The methodology is scientifically acceptable and the report is sufficiently well documented.
Cross-referenceopen allclose all
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to other study
Data source
Reference
- Reference Type:
- publication
- Title:
- Unnamed
- Year:
- 1 995
Materials and methods
- Study type:
- indirect photolysis
- Principles of method if other than guideline:
- This study invastigated the reaction between haloacetates (including TFANa) and the most likely strong one electron oxidants to be able to react in atmospheric droplets: the radicals Cl2-, SO4- and OH. Rate constants for the reactions of the radicals with haloacetates were measured by laser-flash photolysis. Decay or formation curves observed subsequent to the flash were average before undergoing least-square analysis to obtain the first order rate constants.All the chemicals used were the purest grade available and all the experiment were performed in aquous medium with water purified.
- GLP compliance:
- no
Test material
- Reference substance name:
- Sodium trifluoroacetate
- EC Number:
- 220-879-6
- EC Name:
- Sodium trifluoroacetate
- Cas Number:
- 2923-18-4
- Molecular formula:
- C2HF3O2.Na
- IUPAC Name:
- sodium trifluoroacetate
- Details on test material:
- - Name of test material (as cited in study report): Sodium salt of Trifluoroacetate (TFA)
- Molecular formula (if other than submission substance): CF3COO-
- Other: test material obtained from Aldrich and of the purest grade available.
Constituent 1
- Specific details on test material used for the study:
- Details on properties of test surrogate or analogue material (migrated information):
See the endpoint study summary "Environmental fate and pathways" for the read-across justification.
Study design
- Radiolabelling:
- no
Sensitiser (for indirect photolysis)open allclose all
- Type of sensitiser:
- NO3 radical
- Concentration of sensitiser:
- other: 4 different substrates concentrations
- Type of sensitiser:
- OH radical
- Details on sensitiser:
- Use of gamma radiolysis to produce OH (dose rate= 1.22 Gy.s-1 or 4.10 Gy.s-1)
- Concentration of sensitiser:
- other: 4 different substrates concentrations
- Type of sensitiser:
- other: SO4-
- Details on sensitiser:
- produced by the 248 nm excimer laser-flash photolysis of sodium persulfate solution.
- Concentration of sensitiser:
- other: 4 different substrates concentrations
- Type of sensitiser:
- other: Cl2-
- Details on sensitiser:
- produced by the reaction of SO4- with Cl-.
- Concentration of sensitiser:
- other: 4 different substrates concentrations
Results and discussion
- Transformation products:
- not measured
Any other information on results incl. tables
The relative reactivities of the haloacetates was determined to be :
CH2ClOO- (MCA) > CH2FCOO- (MFA) > CHCl2COO- (DCA) > CHF2COO- (DFA) > CCl3COO- (TCA) > CF3COO- (TFA).
Rate constants for some reactions of radicals with TFA in water in units of L.mol-1.s-1
3.9E+03 for NO3
1.6 +/- 0.1E+04 for SO4-
< 104 for Cl2-
<1E+06 for OH
Applicant's summary and conclusion
- Validity criteria fulfilled:
- not applicable
- Conclusions:
- TFA shows a low relative reactivity at the photolysis in aqueous solution.
- Executive summary:
The kinetics of the acqueous-phase reactions of the free radicals OH, Cl2- and SO4- with the halogenated acetates, CH2FCOO- (MFA), CHF2COO- (DFA), CF3COO- (TFA) and with CH2ClOO- (MCA), CHCl2COO- (DCA), CCl3COO- (TCA) were investigated. Generally, the reactivity decreases with increasing halogen substitution and is in the order k(OH) > k(SO4 -) > k(Cl2 -), but there is no general relation between the effect on reactivity of chlorine and fluorine substitution.
Rate constants for some reactions of radicals with TFA in water in units of L.mol-1.s-1 were 3.9E+03 for NO3; 1.6 +/- 0.1E+04 for SO4 -; < 104 for Cl2- and <1E+06 for OH. TFA shows a low relative reactivity at the photolysis in aqueous solution.
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