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EC number: 267-956-0
CAS number: 67953-76-8
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
• 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
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.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.
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