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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 244-742-5 | CAS number: 22036-77-7
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
EDTMP and its salts are considered not readily biodegradable and not inherently biodegradable. One study is available for EDTMP-xNa which shows 0% biodegradation in a ready test. In tests performed with EDTMP-H, low but recordable levels of biodegradation were seen in two other ready and two inherent tests. A high degree (75-90%) of removal was recorded in the longer term (extended SCAS test over 126 days; Horstmann and Grohmann, 1988).
Key value for chemical safety assessment
Additional information
One reliable test of ready biodegradation is available for EDTMP-xNa. This showed 0% biodegradation in 28 d (Douglas and Pell, 1984). Two reliable tests of ready biodegradation (similar to modified OECD screening test method) and two reliable tests of inherent biodegradation (semi-continuous activated sludge) are available for EDTMP-H. All available results are consistent with very low levels of biodegradation in the short term (28-day) time window. The levels of removal observed were ca. 30% in 28 d (Martienssen, 2010, modified OECD test of ready biodegradation); ca. 5 to ca. 10% in 28 d (Horstmann and Grohmann, 1988, modified OECD test of ready biodegradation) , 1.85 and 6.67% in 24-h and 72-h cycles respectively in a 220-day test (Saeger, 1978, extended SCAS test) and 75-90% in 126 d (Horstmann and Grohmann, 1988, extended SCAS test).In dilute aqueous conditions of defined pH, a salt will behave no differently to the parent acid, at identical concentration of the particular speciated form present, and will be fully dissociatedto yield EDTMP and sodium ions.Hence some properties (measured or expressed in aqueous media) for a salt can be directly read across (with suitable mass correction) to the parent acid andvice versa (see CSR section 1 for mass correction values). In the present context the effect of the alkaline metal counter-ion (sodium) will not be significant and has been extensively discussed in the public literature. In biological systems and the environment, polyvalent metal ions will be present, and the phosphonate ions show very strong affinity to them. |
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.
