Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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: 939-424-4 | CAS number: 1469983-44-5
Endpoint summary
Administrative data
Description of key information
Fish 96h-LC50 Pimephales promelas: 15 mg/L
Invertebrates 48h-EC50 Daphnia magna: 22.5 mg/L
Algae 72h-EC50 Selenastrum capricornutum: 62.9 mg/L
Micro-organisms 48h-NOEC Activated sludge: 98 g/L
Fish 35d-NOEC Danio rerio: 4.6 mg/L
Invertebrates 21d-NOEC Daphnia magna: >4.83 mg/L
Additional information
The aquatic acute toxicity of Diacid 1550 was studied on fish, invertebrates, algae and microorganisms. The results are summarised in the table:
Study |
Value |
Remarks |
Fish 96h-LC50 Pimephales promelas |
15 mg/l |
Rel. 2, no GLP Cooke 1991 |
Invertebrates 48h-EC50 Daphnia magna |
22.5 mg/l |
Rel. 2, no GLP Cooke 1991 |
Algae 72h-EC50 Selenastrum capricornutum
|
62.9 mg/l |
Rel. 2, GLP study, Substance name not fully specified Goldsworthy 1991 |
| Micro-organisms 48h-NOEC Activated sludge | 98 g/l | Rel. 2, no GLP study Goldsworthy 1991 |
For the preparation of the test media no solvent has been used. For the algae test (where the highest test concentrations were used), it was explicitly stated that the tested product (39% active ingredient) was water soluble and that no solvent was needed.
The fact that the tested product also contains other substances may explain why the test concentrations in the test media are above the water solubility stated for the main constituent (15 mg/l). In view of the explicit remark that the test substance was water soluble, the fact that the 15 mg/l limit is exceeded is not expected to impact the reliability of the test results.
The long-term aquatic toxicity was tested on fish and invertebrates. The results are summarised in the table:
Study |
Value |
Remarks |
Fish 35d-NOEC Danio rerio |
4.6 mg/l |
Rel. 1, GLP study according to OECD 210 |
Invertebrates 21d-NOEC Daphnia magna |
>4.83 mg/l |
Rel. 1, GLP study according to OECD 211 |
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.
