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Registration Dossier
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EC number: 308-760-8 | CAS number: 98246-87-8
- 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

Endpoint summary
Administrative data
Description of key information
Additional information
All alkyl ketene dimers are classified as readily biodegradable based on the ready biodegradability test result of 2-Oxetanone, 3-C12-16-alkyl-4-C13-17-alkylidene and the biodegradation mechanism of ketones
Experimental data on the biodegradation in water and sediment or soil of alkyl ketene dimer are not available. Therefore, for the degradation rate the default value according to the TGD is estimated, assuming that no degradation takes place in the bound phase. As no tests under anaerobic conditions are available, it is assumed that the substance is not degraded in the anoxic sediment layer. The partitioning of AKD in soil, sediment and sludge was calculated using the maximum Koc value of 1 * 106L/kg. The suggested half-life for alkyl ketene dimmer in the aerobic sediment is 30000 days and 300000 days for the bulk sediment. The suggested half-life for alkyl keten dimmer in bulk soil is 30000 days. Chemical hydrolysis of AKD is not influenced by adsorption onto solids nor by the absence of oxygen and therefore the half life in the aerobic sediment layer, in the anaerobic bulk sediment and in the bulk soil should be based on the hydrolysis rate in the aqueous phase. The hydrolysis half live in the aqueous phase at pH 8 and 25 °C ranges between 35 to 210 hours.
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