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Diss Factsheets
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EC number: 269-616-7 | CAS number: 68307-94-8
- 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
Basic toxicokinetics
Administrative data
- Endpoint:
- basic toxicokinetics
- Type of information:
- other: In accordance with REACH Annex VIII (8.8.1) an assessment of toxicokinetic behavior has been conducted to the extent that can be derived from the relevant available information.
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Relevant studies were reviewed by a qualified toxicologist with a view to fulfilling the requirements of Annex VIII (8.8.1).
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
Materials and methods
- Objective of study:
- toxicokinetics
Test guideline
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- In accordance with REACH Annex VIII (8.8.1) an assessment of toxicokinetic behaviour has been conducted to the extent that can be derived from the relevant available information. The assessment is based on the Guidance on information requirements and chemical safety assessment R.7c: Endpoint specific guidance (ECHA, May 2008)
- GLP compliance:
- no
- Remarks:
- Not relevant for assessment
Test material
- Reference substance name:
- Phosphoric acid, mono- and di-C6-10-alkyl esters
- EC Number:
- 269-616-7
- EC Name:
- Phosphoric acid, mono- and di-C6-10-alkyl esters
- Cas Number:
- 68307-94-8
- Molecular formula:
- Not applicable (a generic molecular formula cannot be provided for this specific UVCB substance)
- IUPAC Name:
- Esterification Products of Phosphorus Pentoxide and Alcohols C6-C10 (even numbered)
- Details on test material:
- Details on the test material used in the studies assessed are presented in the respective endpoint study records.
Constituent 1
Results and discussion
Any other information on results incl. tables
TOXICOKINETIC BEHAVIOUR
The substance is composed, as listed in the Section 1.2 of IUCLID. It is an amber coloured slightly viscous liquid and the molecular weight ranges from 98.0 - 518 g/mol. The low vapour pressure value (3.1 x 10-1 Pa at 25°C) and predicted negative explosive
and oxidising properties shows that the substance is non volatile therefore inhalation is not a significant route of exposure. The substance has a high log octanol/water partition coefficient value (Log10 Pow 3.15 - >6.5) and low water solubility (0.183 – 8.77 x 10-11 g/l; Butler, 2012). The available acute oral/dermal studies and the repeated dose/reproductive screening studies showed evidence of absorption and metabolism but did not show any evidence of excretion.
The test item is non-mutagenic in bacteria, non-clastogenic in mammalian cells in vitro and non-mutagenic in mammalian (CHO) cells
in vitro in either the absence or presence of an auxiliary metabolising system. The test item is not a skin sensitizer, however it is considered an irritant.
Absorption
Results of the repeated dose/reproductive screening study in rats showed evidence to support the gastric absorption of the test item . This is supported by the lipophilic nature of the substance (log10 Pow 3.15 - >6.5). This would suggest that the gastro-intestinal tract provides a route of absorption, following oral administration, before entering the circulatory system via the blood.
Absorption may also take place via the skin. Although the substance is not a skin sensitizer there is evidence of dermal irritation.
Therefore damage to the skin surface may allow for increased penetration of the substance through the skin.
The low vapour pressure value (3.1 x 10-1 Pa at 25°C) shows that the substance is not available as a vapour therefore inhalation is not a significant route of exposure.
Distribution
Systemic distribution is evident from the repeated dose/reproductive screening study as a result of the organ changes observed. The lack of evidence to suggest the test item is a skin sensitizer suggests that it does not bind to carrier proteins in the circulatory system.
Once absorbed, the substance may potentially accumulate in the adipose tissue due to the high log octanol/water partition coefficient value (Log10 Pow 3.15 - >6.5).
Metabolism
The results of the repeated dose/reproductive screening study showed the evidence of an adaptive response in the liver and thyroids in rats ; which is normally associated with enhanced metabolism. The results of the genotoxicity assays have shown that genotoxicity is neither enhanced or diminished in the presence of the S9 metabolising systems
Excretion
There is no evidence to indicate the route of excretion but poor water-soluble products are not favourable for urinary excretion and therefore biliary excretion may well be a significant route for this material. As there is evidence of hepatic metabolism this does
not, however, rule out urinary excretion. The main reason for xenobiotic metabolism is to render the product more water soluble thereby facilitating urinary excretion. Any test item that is not absorbed will be excreted in the faeces.
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information): other: See summary in conclusions section
The available information suggests that absorption of the test substance from the gastrointestinal tract can take place, primarily as a consequence of the high log octanol/ water coefficient of the test item. Some absorption may also take place via the skin. Once absorbed, enhanced metabolism may occur and the substance would result in accumulation in the adipose tissues. Biliary excretion may well be significant route for the substance. - Executive summary:
The available information suggests that the substance is readily available via the oral route; however absorption via the skin is also possible. This is supported by the physicochemical properties of the substance. Once absorbed, the substance would result in
accumulation in the adipose tissues. Biliary excretion is considered to be the significant route for the substance.
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