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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
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EC number: - | CAS number: -
- 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
Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- other:
Reference
Description of key information
The partition coefficient could not be determined using a procedure designed to be compatible with EC Method A8 and OECD Guideline No. 117 as the substance hydrolyses rapidly. A calculated estimate of the water solubility using WSKOW v 1.42 (US EPA) gave 2.8E-07 mg/L. The test item was shown to dissolve in n-octanol at approximately 5.0E05 mg/L (equivalent to 50% w/w). Using these values to estimate a partition coefficient value gave a log Pow of 12.3.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 12.3
- at the temperature of:
- 20 °C
Additional information
The partition coefficient could not be determined using a procedure designed to be compatible with EC Method A8 and OECD Guideline No. 117. The test substance is highly unstable in contact with water. This meant that the shake-flask method was not applicable as the test item comes into direct contact with water and would have hydrolysed in the time required to complete the study. The Guidelines for the HPLC method state that the method is not applicable if the test item reacts with the mobile phase. The test item was known to react with water and also expected to be reactive with methanol as it is a protiotic solvent. To assess this some injections were run. The test item was prepared at 1000 and 10000 mg/L in tetrahydrofuran, which had bee dried by addition of anhydrous sodium sulphate to remove entrained water. This proved unsuccessful as no definitive peak(s) that represented the test item could be detected. The method was therefore proved not to be applicable. The next approach was the calculation of partition coefficient based on the test item's solubility in n-octanol and water. Again from the water solubility test it was known that a single definitive value for the water solubility of the test item was not possible because of hydrolysis. A calculated estimate of the water solubility using WSKOW v 1.42 (US EPA) gave 2.8E-07 mg/L. The test item was shown to dissolve in n-octanol at approximately 5.0E05 mg/L (equivalent to 50% w/w). Using these values to estimate a partition coefficient value gave a log Pow of 12.3. In comparison the estimated log Pow using KOWWIN v 1.68 was 11.1. Although an estimate of the partition coefficient was calculated, due to the ready hydrolysis of the test item, it would be expected that it exists in the environment as its hydrolysis products: boric acid and 2-propyl heptan-1-ol. These components are already registered with partition coefficient values available; so it was considered that further testing with respect to these components was not required.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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