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Diss Factsheets
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EC number: 204-552-5 | CAS number: 122-52-1
- 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
Data derived from SIDS Initial Assessment Report For SIAM 16 (Triethyl Phosphite), 2003 Paris.
The main degradation process in water is hydrolysis. In acid solution (pH= 4) triethyl phosphite reacts immediately with water to form diethyl phosphite and ethanol. At pH 7 triethyl phosphite hydrolyses completely within 20 minutes, after 3 hours 89.3% diethyl phosphite and 10.7 % monoethyl phosphite are formed. At pH 9 triethyl phosphite is more stable (t1/2water: ca. 5.1 hours), 70 % of the substance remains unhydrolyzed after 3 hours. In 2 tests on ready biodegradation triethyl phosphite was degraded by 49 - 69 %. Therefore, it did not reach the criteria for ready biodegradability. However, it can be assumed that triethyl phsophite is inherently biodegradable. From two studies on the ready biodegradation of diethyl phosphite it can be concluded that diethyl phosphite is not readily biodegradable but can also be regarded as inherently biodegradable. From the degradation curve it can be assumed that hydrolysis was the prerequisite for biodegradation. It is expected that in the atmosphere a degradation of triethyl phosphite occurs due to indirect photolysis (t1/2air: ca. 6.6 hours). As the substance hydrolyses under environmental conditions the calculation of a Mackay distribution model is also not appropriate. Due to rapid hydrolysis bioaccumulation of triethyl phosphite is not expected. The calculated log Kow value for diethyl phosphite (log Kow = -0.2) indicates no bioaccumulation potential of the hydrolysis product.
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