Registration Dossier
Registration Dossier
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EC number: 203-614-9 | CAS number: 108-77-0
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
The bioaccumulation potential of the test item was estimated by calculation of the BFC value with EPIWIN software using BCFBAF v1.5. A. A BCF value of 0.293 L/kg wwt was calculated. Thus cyanuric chloride was considered that it is unlikely to have bioaccumulation potential.
Key value for chemical safety assessment
- BCF (aquatic species):
- 0.293 L/kg ww
Additional information
The study on the bioaccumulation in aquatic species preferably fish was waived as its performance is scientifically not justified. Regulation (EC) No 1907/2006 (Annex IX, sect. 9.3.2, column 2) states as follows:
"The study need not be conducted if:
- the substance has a low potential for bioaccumulation (for instance a log Kow <= 3) and/or a low potential to cross biological membranes, or
- direct and indirect exposure of the aquatic environment is unlikely.”
Abiotic degradation study on the test item shows that the test item degradates in contact with water (hydrolysis). In the course of the hydrolysis of the test item the intermediate degradation products 2,4-dichlor-6-hydroxy-1,3,5-triazine (first intermediate) and 2-chlor-4,6-dihydroxy-1,3,5-triazine (also named 6-chloro-1,3,5-triazine-2,4(1H,3H)-dione, sodium salt) (second intermediate) occur that in turn will be further hydrolysed to cyanuric acid. Therefore, the direct and indirect exposure of the test item to water is highly unlikely.
Further, using EPIWIN 4.1 software and the ACD/Log D Suite program for cyanuric chloride a bioconcentration factor (BCF) of 0.293 L/Kg wwt and a partition coefficient (n-octanol/water) log Kow of 2.14 were calculated, respectively. Additionally using the EPIWEB KOCWIN v2.00 software Log Koc of the degradation product cyanuric acid was calculated to be 1.902.
These experimental data and the theoretical calculations do not indicate a potential of the test item and its degradation product for bioaccumulation.
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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