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Diss Factsheets
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EC number: 209-008-0 | CAS number: 552-30-7
- 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
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.739 mg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 7.39 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.074 mg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 10 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 4.97 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.497 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 9.95 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Where possible, PNEC calculations have been undertaken using default assessment factors in accordance with ECHA guidance on information requirements and chemical safety assessment Chapter R.10: Characterisation of dose [concentration] response for environment.
PNECs were derived from the study with the most sensitive species available for each compartment/endpoint. Acute aquatic effects tests with fish, daphnids and algae showed no significant effects and LC50s were not established. Other than effects on algae, no long-term effects data are available on the substance itself.
Conclusion on classification
In determining the classification appropriate to trimellitic anhydride, it is necessary to consider all available evidence concerning its persistence, potential to accumulate and predicted or observed environmental fate and behaviour that may present a long-term and/or delayed danger to the structure and/or functioning of aquatic ecosystems. These points are considered below.
Persistence.
Reliable studies are available to demonstrate that TMA (immediately hydrolysed to TMLA under the test conditions) is readily biodegradable. TMA may therefore be expected to degrade rapidly, and to be completely mineralised, i.e. converted to CO2and H2O without forming any recalcitrant metabolites. Trimellitic anhydride and its degradation intermediates are therefore non-persistent.
Potential to accumulate.
Log10 Kow values for trimellitic anhydride (measured and calculated, but of no practical relevance in view of the hydrolysis behaviour of TMA) and its hydrolysis product trimellitic acid (measured) are all less than 3.0. The potential for trimellitic acid to bioaccumulate in the tissues of organisms that inhabit aquatic or terrestrial matrices contaminated with TMA residues is therefore negligible. The risk that trimellitic anhydride or its derivatives may biomagnify through successive trophic levels of aquatic or terrestrial food chains is consequently also negligible.
Environmental fate and behaviour.
TMA is a tricarboxylic acid anhydride. The first steps that may be predicted in its environmental fate, prior to biodegradation, are its immediate hydrolysis to trimellitic acid followed by conversion to trimellitate salts. Acute aquatic effects tests with fish, daphnids and algae showed no significant effects and LC50s were not established. Other than effects on algae, no long-term effects data are available on the substance itself. These studies demonstrate the low intrinsic toxicity of trimellitate to aquatic biota, and - taking into account its susceptibility to rapid biodegradation - provide assurance that trimellitic anhydride does not present a long-term and/or delayed danger to the structure and/or functioning of aquatic ecosystems.
No classification is triggered based on available data, according to EEC Council Directive 79/831/EEC Annex VI, Part II (D) as described in Commission Directive 93/21/EEC or Regulation (EC) No 1272/2008.
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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