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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 911-369-0 | 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
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
Cyclacet has a BCF of 156 l/kg based on read across from Verdox, which are experimentally tested in OECD TG 305 (Klimisch 1).
Key value for chemical safety assessment
- BCF (aquatic species):
- 156 L/kg ww
Additional information
The BCF of Cyclacet is derived by using read across from Verdox which documentation is presented below. This section starts, however, with the executive summaries of the BCFs of Verdox.
Bioaccumulation of Cyclacet (EC no. 911-369-0) using read across from Verdox (CAS no. 20298-69-5).
Introduction and hypothesis for the analogue approach
Cyclacet has a tricyclodecenyl type backbone to which an acetic ester is attached. For this substance no experimental bioaccumulation test (OECD TG 305) is available. In view of its log Kow of 3.9, further BCF information is relevant because this value of 3.9 is higher than the cut off of 3 presented in Annex IX and therefore further information is needed. In accordance with Article 13 of REACH, lacking information can be generated by i.e. applying alternative methods such as in vitro tests, QSARs, grouping and read-across. For assessing the bioaccumulation potential of Cyclacet the analogue approach is selected because for the analogue Verdox in vivo experimental bioaccumulation information is available, which can be used for read across.
Hypothesis: Cyclacet has the same bioaccumulation potential as Verdox.
Available information: For Verdox the BCF is 156 l/kg (including 5% lipid normalisation), based on OECD TG 305 test (GLP and Kl. 1, respectively).
Target chemical and source chemical
Chemical structures of Cyclacet and analogue Verdox is shown in the data matrix, including physico-chemical properties thought relevant for bioaccumulation and read across.
Purity / Impurities
Cyclacet is a reaction mass containing a mixture of two very similar isomers differing only the site of the double bond which can be at the 5-yl or 6-yl position. All impurities are <1%.
Analogue approach justification
According to Annex XI 1.5 read across can be used to replace testing when the similarity can be based on a common backbone and a common functional group. When using read across the result derived should be applicable for C&L and/or risk assessment and it should be presented with adequate and reliable documentation, which is presented below.
Analogue justification: For Cyclacet the substance Verdox is selected because of the structural similarity and for Verdox experimental BCF information is available.
Structural similarities and differences: Cyclacet has a similar hydrocarbon backbone and acetic ester functionality as Verdox. Cyclacet has the hydrocarbons somewhat differently organised, it has an extra bridge on the cyclohexyl ring and a pentene ring, while Verdox has an additional tert-butyl group to the cyclohexyl ring.
Bioavailability: Cyclacet and Verdox have similar bioavailability based on chemical structures and similar molecular weight. Cyclacet has a somewhat lower log Kow compared to Verdox but the log Kow is still in the range of being bioavailable.
Metabolism: Cyclacet and Verdox will be similarly metabolised because both are acetic esters and these ester group will be readily cleaved by the carboxyl-esterases in fish into the respective alcohols (Wheelock et al. 2008). The respective alcohols will be conjugated and excreted via the kidneys.
Uncertainty of the prediction:There or no remaining uncertainties other than those already addressed above.
Data matrix
The relevant information on physico-chemical properties and other environmental fate properties are presented in the Data Matrix below.
Conclusions for Bioaccumulation
For Cyclacet no experimental BCF is available. For the analogue Verdox such information is present, which can be used for read across. When using read across the result derived should be applicable for C&L and/or risk assessment and be presented with adequate and reliable documentation. The current document fulfils this documentation. Verdox has an experimental steady state BCF values of 156 l/kg (5% lipid normalised, OECD TG 305 test, Kl. 1), which can be directly applied to Cyclacet because the molecular weight of both is almost the same: 192 for Cyclacet and 196 for Verdox.
Final conclusion: Cyclacet is not bioaccumulating and has a BCF of 156 l/kg.
Data matrix to support the read across to Cyclacet from Verdox on bioaccumulation
Common name |
Cyclacet |
Verdox |
Target / Source |
Target |
Key Source |
Molecular structure |
||
CAS
|
2500-83-6 (5-yl) 54830-99-8 (Generic) |
20298-69-5 |
Einecs number |
911-369-0 |
243-718-1 |
REACH registered |
Registered |
Registered |
Empirical formula |
CH12O2 |
C12H20O2 |
Molecular weight |
192 |
196 |
Physico-chemical properties |
|
|
Appearance |
Liquid |
Handled as liquid |
Water solubility in mg/l |
186 |
10 |
Log Kow |
3.9 |
4.75 |
Environmental Fate |
|
|
Bioaccumulation in l/kg |
156 RA from Verdox |
156 (OECD TG 305, Kl. 1) |
Reference to support ester cleavage
Wheelock, C.E., Philips, B.M., Anderson, B.S., Miller, J.L., Miller, M.J., and Hammock, B.D., 2008, Application of carboxylesterase activity in environmental monitoring and toxicity identification evaluations, (TIEs), in Reviews of Environmental Contamination an Toxicology, ed. Whitacre, 117-178, D.M., Springer.
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.