Registration Dossier
Registration Dossier
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EC number: 942-590-0 | CAS number: -
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
EC50(48h)= 44.9 (28.4-62.2) mg/L
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 44.9 mg/L
Additional information
For this endpoint, the read across between PWH/ammonium and PWH/sodium salt is valid, because this environmental toxicological property is defined by the main component. The read across justification that takes into account the ammonium ion properties is attached on section 13 of the dossier.
Three tests have been performed following OECD 202 on the registering substance (SSP3, 4 and 5). The same test has been performed on the similar substance Paraffin waxes and Hydrocarbon waxes C14-17, chloro, sulfochlorinated, low sulphonated, saponified (SSP1), here reported as supporting study, demonstrating the differences in composition can trigger also a difference in aquatic toxicity well evident for this sensitive species.
Sample SSP4 has the same molecular chain distribution than sample SSP1, but is very different in hydrophilicity, content of salifiable portion (SO3), that seems the most important factor that can have an influence on the aquatic toxicity. The greater bioavailability for sample SSP4 supports even stronger the influence of the SO3% content on aquatic toxicity:
| IC0 | IC50 | IC100 | C chains | SO3 | |
| SSP1 | 0,01 | 0,22 | 10,00 | 14-17 | 2,5-3,5 |
| SSP4 | 1,90 | 3,80 | 20,70 | 14-17 | 10,50 |
| SSP3 | 4,30 | 44,90 | 100,00 | 18-30 | 5,50 |
| SSP5 | 50,00 | 100,00 | 100,00 | 20-30 | 3,00 |
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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