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EC number: 267-956-0
CAS number: 67953-76-8
Based on the available data there are no effects data for terrestrial
Terrestrial testing is not an Annex VIII requirement. However, HEDP and
its salts are highly adsorbing to soil and soil mineral substrates. The
nature of the adsorption is believed to be primarily due to interaction
with inorganic substrate or generalised surface interactions. High
adsorption is consistent with similar behaviour seen across other
phosphonates, and other common complexing agents such as EDTA. By
reference to findings with other similar substances, the binding occurs
very rapidly and is effectively irreversible. For environmental fate
purposes in exposure assessment this is assessed as a removal process.
The available evidence for HEDP and its salts in respect of terrestrial
hazard has been considered in the context of the 'soil hazard category'
defined in ECHA Guidance (on Information requirements and chemical
safety assessment) part R.7c. HEDP and its salts are considered to be
soil Hazard Category 3 due to their high adsorption soil values and low
toxicity to aquatic organisms properties.
According to the soil hazard category 3 approach for screening
assessment, a confirmatory long-term terrestrial toxicity study is
required and this is available, demonstrating low toxicity (NOEC 500
mg/kg active acid, Noack, 2014). Testing
for toxicity to additional terrestrial organisms (plants and
micro-organisms) is not considered necessary because the
risk characterisation ratio (RCR) based on PNECsoil is <1.
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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