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EC number: 807-747-9 | CAS number: 144429-84-5
- 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
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
In aerobic water/sediment systems, the substance disappears rapidly. The processes involved are degradation and formation of bound residues. The main degradation product identified is Metilox acid (CAS: 20170-32-5). Concentrations of Metilox acid are also subject to degradation and formation of bound residues.
Key value for chemical safety assessment
Additional information
Assessment of source substance (EC 406 -040 -9)
Degradation in aerobic water/sediment systems (OECD 308):
The route and rate of degradation of the substance in two aquatic systems (river and pond) under aerobic conditions was investigated at 20 °C in the dark according to OECD 308 (2002) at a concentration of 15 μg/L.
The substance disappeared rapidly in water and sediment in the river and pond systems:
Total recoveries (material balances) of the applied radioactivity (AR) averaged 93.3 ± 2.3% and 93.7 ± 2.6% in the river and pond systems.
After 2 days only 30% of the radioactivity was related to the parent substance in the total systems (water and sediment for pond and river system), whereas 50% of the radioactivity refers to transformation products. Up to nineteen radioactive fractions were detected of which one of the major ones (M1) was identified as Metilox acid. M1 increased rapidly to maximum levels of 34.2% AR and 42.4% AR in the river and pond total systems, respectively, after 2 days of incubation and equally rapidly declined.
Therefore, it can be concluded that 50% of the substance was degraded after 2 days.
The mineralisation of the test item was very low, not exceeding 6% of the applied radioactivity for both systems after 100 days of incubation. Other organic volatile compounds did not exceed 1 % of the applied radioactivity.
The amount of non-extractable radioactivity was high for both test systems. Bound radioactivity in the sediment was ca. 35% in the river system and ca. 43% in the pond system after 14 days and reached maximum mean levels of 52% and 54% AR in the river and pond systems, respectively, at the end of the study (day 100).
DT50 (parent, water) = 0.2 – 0.3 days
DT50 (parent, sediment) = 4.5 – 5.5 days
DT50 (patent, total system) = 1.3-1.7 days
DT50 (M1, Metilox, total system) = 6.8 – 7.6 days
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