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EC number: 267-956-0
CAS number: 67953-76-8
The test item shows a boiling (and/or
a thermal decomposition with evaporation of the decomposition
components) from a subcomponent (ca. 11 wt. % - possibly water of
crystallisation) earliest at ca. 103°C (at 981 mbar) according to the
definition in the OECD guideline 103.
Boiling point: HEDP-xK is expected
to melt above 450°C
The requirement to test the
boiling point of HEDP-xK was waived because the substance is expected to
have a melting temperature of >450°C (>723 K). This statement is
supported by the evidence from a DSC study which demonstrates that the
anhydrous form of the parent acid (HEDP-H) has a melting temperature of
>450°C. The DSC thermograms show evidence of loss of water at about
See melting point study reported
in IUCLID Section 4.2.
This conclusion is supported by
available data for HEDP-4Na which indicates that the test substance
undergoes loss of water from 103°C at 981 mBar.
In available secondary sources to
which reliability could not be assigned, aqueous solution of HEDP-xK has
a reported initial boiling point of 100°C.
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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