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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 205-769-8 | CAS number: 150-76-5
Endpoint summary
Administrative data
Description of key information
Additional information
Four data are referenced for terrestrial toxicity:
- toxicity to soil macroorganisms: Hartenstein (1982, reliability 3) measured the growth rate and mortality of Eisenia foetida after 2 weeks of exposure with the test substance in activated sludge. A 42 day LC100= 40 g/kg soil dry weight (4% w/w reported in the publication) was calculated based on nominal test material concentration, for mortality effect, and a 42 day LOEC= 10 g/kg dry weight (1% w/w reported) was calculated based on nominal test material concentration, for growth rate.
- toxicity to terrestrial plants: Wang et al. in 2002 (reliability 3) measured by a filter paper contact method the seed germination of Cucumis sativus when PMP is applicated for 2 days. The resulting 2 day EC50 was 229.3 mg/L based on nominal test material concentration.
- toxicity to birds: Schafer and Jacobson in 1983 (reliability 3) carried out an acute oral toxicity on Agelaius phoeniceus (red- winged blackbird). The measured LD50 was > 113 mg/kg bw.
- toxicity to frogs: Wang et al. in 2001 (reliability 2) investigated the PMP toxicity on frog tadpoles. The study was conducted in semi static conditions, in freshwater, the exposure duration was 24 hours. No mortality occurred in the control. The resullting 24h LC50 was 294 mg/L.
Additional terrestrial tests are not required since mequinol is not supposed to be directly applied to soil and an indirect exposure to soil via sewage sludge transfer is unlikely since the substance is readily biodegradable. For such a substance, it can be assumed that it will be biodegraded within the STP process and as a consequence a transfer to the soil compartment is not expected. Furthermore, since Mequinol is neither adsorptive (log Koc = 1,74) nor bioaccumulative (log Kow = 1,3), a significant distribution into the soil compartment and a significant exposure of terrestrial organisms is not expected. Hence, information about effects on terrestrial organisms is not required and the equilibrium partitioning method is used for assessing the hazard to terrestrial organisms.
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.
