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Diss Factsheets
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EC number: 423-340-5 | CAS number: 162881-26-7 CGI 819
- 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
The fate of phenyl bis(2,4,6-trimethylbenzoyl)-phosphine oxide is tied to the fate of the products to which it is applied. The substance generates free radicals within the coating films or sections of the reinforced plastic by means of exposure to UV light. The free radicals are consumed (destroyed) in the curing process, with limited residual substance in fully cured films. Organo-phophorus residues are encased in the polymer matrix and do not migrate.
Should limited uncured product be disposed of to landfill, e.g. as residues in contaminated packaging, it should be adsorbed to soil, based on its very low water solubility and high adsorption coefficient. As this substance is a photoinitiator, it would be expected to rapidly degrade in the environment upon exposure to natural light.
Phenyl bis(2,4,6-trimethylbenzoyl)-phosphine oxide showed 0% degradation after 28 days and was determined to be not readily biodegradable. It was found to be non-inhibitory to the activity of the inoculum.
Bioaccumulation testing was not undertaken. Since the substance is not ready biodegradable, has a log Pow value of 5.77 and molecular weight of 418.47 g/mol, bioaccumulation could be a perceived risk]. However, the very low water solubility (< 0.1 mg/L), low environmental exposure and expected degradation upon exposure to natural light should limit bioaccumulation.
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