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EC number: 267-956-0
CAS number: 67953-76-8
Please see Attachment 1
for Thermograms and thermographic data for
Determinations 1 and 2.
properties of the test item have been determined.
Methods employed are
designed to be compatible with those specified in Commission Regulation
(EC) No 440/2008 of 30 May 2008, Part A: Methods for the determination
of physico-chemical properties.
The determination was
carried out by differential scanning calorimetry (DSC) using the
procedure specified in ASTM E537-86 designed to be compatible with
Method A1 Melting/Freezing Temperature ofCommissionRegulation (EC) No
440/2008 of 30 May 2008.
temperature of the test item has been determined to be not less than
point: The acid form [HEDP-H] was observed to have a melting/freezing
temperature of >450°C (>723 K). This conclusion is read across to the
salt to indicate that HEDP-xK will also have a melting temperature of
>450°C (>723 K).
The melting point of the anhydrous
form of the parent acid (HEDP-H) was determined using differential
scanning calorimetry (DSC) in accordance with ASTM E537-86 test method
and in compliance with GLP. HEDP-H (anhydrous form) was observed to have
a melting/freezing temperature of >450°C (>723 K).The
DSC thermograms show evidence of loss of water at about 100°C.
This result is read-across to the
salt, HEDP-xK; the salt will have a higher melting point than the parent
acid. Salts would be expected to melt at a higher temperature than the
parent acid, and to decompose on heating.
This conclusion is supported by
available data for HEDP-4Na which indicates that the test substance
shows no melting up to 500°C at 1013 hPa.
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