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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 248-131-4 | CAS number: 26952-14-7
- 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
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
A measured BCF is not available for any of the members of this category. Instead, log BCF have been calculated on the basis of measured or calculated log Kow using two QSAR. The calculated BCF increase from C6 to C14, before decreasing at higher carbon numbers. The maximum calculated log BCF was 4.66 for tetradecene.
Key value for chemical safety assessment
Additional information
A measured BCF is not available for any members of this category. Log Kow is observed to increase with increasing carbon number for members of this category. As the measured log Kow of the category member with the lowest carbon number (C6, hex-1 –ene) is >3 the bioaccumulation endpoint cannot be waived for any category member. However, ECHA's Guidance on Information Requirements and Chemical Safety Assessment R7c Endpoint Specific Guidance (2008) indicates that before commissioning a new vertebrate test alternative sources of data on the bioaccumulation potential of a chemical should be used.
Nonpolar substances have been shown to have a linear relationship between log Kow and BCF in the log Kow range 1 -6. However, at log Kow >6 a decreasing relationship is observed. Several QSAR have been developed that calculate the BCF of non-polar, hydrophobic compounds on the basis of their log Kow (e.g. Veith et al, 1979, Connell and Hawker, 1988 and USEPA, 2008). Alpha olefins with carbon number ranges of C6-C20 and olefins with carbon number ranges of C6-C22 fall within the applicability domain of these QSAR. For category members with carbon numbers above this log BCF are not calculated, but instead read across from other category members based on the observed trend in calculated log BCF.
The log Kow of icos-1 -ene has been calculated in KOWWIN (log Kow 10.03) and SPARC (log Kow 11.65). The log Kow of icos-2-ene has been calculated in KOWWIN (log Kow 9.95) and SPARC (log Kow 11.68). ECHA's guidance on information requirements and chemical safety assessment - Part C: PBT assessment (2008) states that the aquatic BCF of a substance is probably lower than 2000l/kg if the calculated log Kow is higher than 10. As none of the Kow models have experimental data in this Kow range the reliability of modelled log Kow values >10 is not known. However, as both models indicate a log Kow >10 we can conclude that category members with carbon numbers of C20 and above are unlikely to bioaccumulate.
Category members with carbon number ranges of C10-C18 have calculated log BCF greater than 3, indicating that they may bioaccumulate or pose a risk of secondary poisoning.
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.