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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 940-123-5 | CAS number: 866889-74-9
Toxicity to soil microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
28 d NOEC (nitrate transformation) = 12.8 mg/kg soil DW; OECD guideline 216, RL1, GLP; read-across from C20/22 ATQ
Key value for chemical safety assessment
- Long-term EC10 or NOEC for soil microorganisms:
- 12.8 mg/kg soil dw
Additional information
No experimental data are available for C16-18 DMAPA amidoamine. However, studies are available with the source substance C20/22 ATQ. For justification for read-across see endpoint summary "Terrestrial toxicity".
C20/22 ATQ was tested in a Nitrogen Transformation Testaccording to OECD Guideline 216. After 7 days of exposure the EC25-value for inhibition of the nitrate-N formation rate in soil was 22.0 mg/kg soil dry weight. After 7 days the inhibition of nitrate transformation was below 50 % at all test item concentrations resulting in an EC50-value > 500 mg/kg soil dry weight. The NOEC for nitrate transformation in soil on day 7 was determined to be 12.8 mg/kg soil dry weight.
After 14 days of exposure the EC25-value for inhibition of the nitrate-N formation rate in soil was 32 mg/kg soil dry weight. The EC50for inhibition of the nitrate transformation was determined to be at 176 mg/kg soil dry weight. The NOEC for nitrate transformation in soil on day 14 was set at 12.8 mg/kg soil dry weight.
After 28 days of exposure the following EC-values for inhibition of the nitrate-N formation rate were determined: EC12.5: 16.6 mg/kg soil dry weight, EC25: 49.5 mg/kg soil dry weight, EC50: 76.0 mg/kg soil dry weight. The NOEC for nitrate transformation in soil on day 28 was set 12.8 mg/kg soil dry weight.
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.
