Registration Dossier
Registration Dossier
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EC number: 237-623-4 | CAS number: 13870-28-5
Long-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
Waiving of study:
In accordance with column 2 of REACH Annex IX, a long-term toxicity test with fish (required in section 9.1.6) does not need to be conducted for disodium disilicate (delta-crystalline) as the chemical safety assessment indicates no need for a further investigation. The log Kow is expected to be < 0 and thus the potential for bioaccumulation is very low. In addition it was shown that disodium disilicate (delta-crystalline) is hydrolysed to water glass in aqueous solution which is identical to silicate. Therefore it can be concluded that disodium disilicate (delta-crystalline) is hydrolytically degraded to a naturally occurring substance which is widespread in nature. In addition the concentration related silicate-release of disodium disilicate (delta-crystalline) is not expected to be significantly higher than natural fluctuations in silicate levels. Thus, based on this assessment a long-term toxicity test is not scientifically justified and not in line with animal welfare.
Key value for chemical safety assessment
Additional information
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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