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EC number: 251-649-3 | CAS number: 33704-61-9
- 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
Long-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
A long-term fish toxicity test result can be calculated reliably using the critical body burden approach. This results in a NOEC of 0.17 mg/l.
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Dose descriptor:
- NOEC
- Effect concentration:
- 0.17 mg/L
Additional information
The NOEC calculation method is based on the critical body burden (CBB) approach and is presented in ECHA's R.7b Appendix 7.8-3. The used equation for long-term fish toxicity is CBB = NOEC x BCF. The CBB for narcotic type of chemicals is 0.1-1 mMol. The substance can be considered a narcotic chemical despite the substance containing an alpha,beta-unsaturated bond. The double bond between the two rings (the vinyl-group) has no potential leaving H-groups. On both sides C-atoms are connected to this bond and these C’s are belonging to ring structures. Therefore there is no site of attack for enzymes at this vinyl-site as is also presented by Schultz et al. 2005, discussing alpha,beta-unsaturated bonds. This double bond within these two ring structures is therefore unreactive. Also the ketone bond is unreactive, because of the ring that sterically hinders the reactivity of this ketone bond. This can also be seen in e.g. the liver metabolism profiler of the OECD Toolbox where this vinyl and/ketone group remain intact (see IUCLID section 7.1 on toxico-kinetics). In addition, the acute aquatic toxicity has been calculated using the lethal body burden (LBB) approach (LBB=LC50 x BCF). The LBB is 1.3 mMol when using the LC50 fish of 1.7 mg/L and the measured BCF of 157 (and molecular weight of 206). This LBB value shows that for the chronic fish calculation the CBB of 0.13 mMol can be used. The long-term fish NOEC thus becomes: 0.17 mg/l (0.13 mMol x MW of 206 = NOEC x 157 (BCF).
In view of the reasoning above the uncertainty of the prediction is limited and is also in line with the predicted NOEC value of the long-term QSAR on narcotics for fish which is 0.2 mg/l (using the measured log Kow of 4.2 and EpiSuite as the model). As presented above, the MoA of Cashmeran is via a neutral organic pathway because of the saturated vinyl-bond and the sterically hindered ketone bond.
Schultz, T.W., Netzeva, T.I., Robert, D.W., and Cronin, M.T.D., 2005, Structure-Toxicity Relationships for the effect to Tetrahymena pyriformis of aliphatic carbonyl-containing, alpha,beta-unsaturated chemicals, Chem. Res. Toxicol., 18, 330 -341.
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