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EC number: 931-274-8 | CAS number: 28182-81-2
- 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)
Description of key information
In accordance with column 2 of REACH Annex VII, the test cannot be performed, as the substance decomposes in water within a few hours (half-time 7.7 hours).
The calculated partition coefficient (KOWWIN v 1.66) on the basis of the structural formula of the ideal HDI Trimer with 3 HDI (1,3,5-Triazine -2,4,6(1H,3H,5H)-trione, 1,3,5-tris(6-isocyanatohexyl)-) units is 9.81. By calculation the log Pow value of 9.81 for the main constituent of HDI Trimer (HDI Isocyanurate, n = 3) was calculated according to the KOWWIN program, v. 1.68 © 2000 U.S. Environmental Protection Agency. The calculated log Pow of the corresponding triamine of the main constituent (1,3,5-Triazine -2,4,6(1H,3H,5H)-trione, 1,3,5-tris(6-aminohexyl)-) is 5.54.
In a non-standard test it has been tried to get an estimation of the logPow after hydrolysis. The test item (500 mg) was allowed to drop into water while stirring. Most of the substance adhered to the wall of the glass vessel. About 4 % of the material after hydrolysis was found to be soluble. A water solubility of approx. 20 mg/L can be estimated from DOC- and TNb-determination. However it was not possible to measure the logPow as the concentrations were too low. This means that only a small amount of the hydrolysed product might contribute to a logPow.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 9.81
- at the temperature of:
- 20 °C
Additional information
A determination of the partition coefficient cannot be performed. The TNb-results determined are only slightly above the LOQ. As the test item and the hydrolysis products are only poorly soluble in water it is expected that after shaking with n-octanol, the residue in the aqueus phase is below the limit of quantitation of 1 mg/L. A determination of the partition coefficient is therefore not possible.
The substance hydrolyses rapidly with a half life of 7.7 hours. Therefore, an experimental study with HDI trimer is scientifically unjustified. The hydrolysis product is a complex mixture of water-insoluble oligomeric and polymeric ureas and of
compounds derived from isocyanurates (n-3, 5, 7) where the isocyanate groups have been transformed to amino groups.
Although being a more theoretical apprach, an ideal structure the "corresponding triamine of the sym. HDI trimer (n=3)" was considered in order to get an estimation on the behaviour of the hydrolysed product. For both, the unreacted HDI Isocyanurate (n=3) as well as for the corresponding triamine of the sym. HDI trimer (n=3), calculated values are presented.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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.