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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 220-552-8 | CAS number: 2809-21-4
Toxicity to terrestrial plants
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
In accordance with Column 2 of REACH Annex IX, there is no need to further investigate the effects of this substance in a long-term terrestrial toxicity to higher plants study because:
• The substance is involatile and highly adsorbing and low toxicity was observed in the available pelagic organism and aquatic microorganism tests.
• Based on the aquatic data set, the most sensitive relevant trophic level is invertebrates. A long-term earthworm reproduction test for a closely related salt within the HEDP category is already available and low toxicity was observed (NOEC 500 mg/kg active acid, Noack, 2014).
• The soil hazard category 3 (ECHA guidance part R7(c) table R.7.11-2) applies for this substance. According to the specified approach for soil hazard category 3 substances, if PEC/PNECscreen <1 and no indication of risk from confirmatory long-term soil toxicity testing then no further toxicity testing for soil organisms is necessary, as has been demonstrated for this substance.
• The phosphonate ligand binds strongly and irreversibly to various minerals present in soil and so bioavailability to soil organisms is extremely limited.
Additionally, two reliability 4 studies determine a low level of toxicity for HEDP sodium salts to terrestrial plants.
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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