Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 931-312-3 | CAS number: 53880-05-0
- 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
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
3 -Isocyanatomethyl-3,5,5-trimethyl-cyclohexyl isocyanate homopolymer (IPDI homopolymer) (CAS-Nr. 53880-05-0); Information/Assumptions regarding toxicokinetics
The following remarks on the toxicokinetics of IPDI homopolymer are based on physiochemical properties of the compound and on toxicological data. Experimental toxicokinetic studies were not performed.
IPDI homopolymer is an odourless solid (pellets) with a very low vapour pressure (1.3 * 10 -11 hPa at 20 °C, AQura, 2010) under normal ambient conditions.
In water the substance hydrolyses rapidly with a half-live of clearly below 12 hours (23 °C) at different pH values.
Because of the hydrolyzation potential and a very low water solubility experimental data such as pKa or log Kow can not be obtained for IPDI homolpolymer. The octanol-water partition coefficient of the test substance was calculated using a well established QSAR method at log Kow approx. 14.48 (Evonik, 2009).
Due to the low vapour pressure inhalation exposure via vapour is not to be expected. Wherever aerosolization occurs exposure is possible. There are no indications of systematic toxicity and systemic availability after inhalative exposure of the aerosol. No organ lesions other than respiratory tract could be found, and the clinical signs could all be related to respiratory distress and were seen as a consequence of the irritant properties of the substance (BayerAG, 1996; Pauluhn, 2003; Ma-Hock et al., 2009). These effects most probably are related to the chemical nature of the isocyanate-groups of IPDI homopolymer.
Regarding oral absorption at least partial hydrolysis is assumed to occur in the gastro-intestinal tract. In fact, oral toxicity was very low with an LD50 (rat) of > 14000 mg/kg bw (IBR, 1976). No systemic signs could be observed.
Dermal absorption of IPDI homopolymer could not be excluded based on a calculated log Kow that shows a high lipophility (approx. 14.48; Evonik, 2009). In fact, no signs of systemic toxicity were observed in an acute dermal irritation/corrosion study (LPT, 2005). Nevertheless, the test substance has shown skin sensitizing properties in a guinea pig maximization test (Notox B.V., 2004), thus indicating that a dermal uptake, even though small, can occur. Deducing from that IPDI homopolymer has the property to react with nucleophilic groups of proteins or peptides and form hapten-protein complexes or conjugate-antigens.
No data are available regarding the excretion of absorbed IPDI homopolymer.
Based on the results of several in vitro genotoxicity tests (DeVogel, 2007; Schulz and Hellwig, 2007; Harlan, 2009 and Herbold, 2002; all performed with and without metabolic activation) it is concluded that DNA-reactive metabolites of IPDI homopolymer will not be generated in mammals in the course of hepatic biotransformation.
Supplementary information of 2017-registration: A Developmental Toxicity Study with repeated oral administration of the test substance (LPT, 2017) revealed no test item-related findings at all. This gives further proof that administration of the test substance, even after repeated oral exposure of doses up to 1000 mg/kg, does not lead to systemic toxicity and thus systemic availability is expected to be low after oral exposure
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.