Registration Dossier
Registration Dossier
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EC number: 259-709-0 | CAS number: 55566-30-8
Melting point / freezing point
Administrative data
Link to relevant study record(s)
Description of key information
The melting point of the dried solid THPS (100%) was determined between 54.2 and 81.5°C at ambient pressure and the freezing point of the THPS aqueous solution 75% gives a freezing temperature < -20 °C or 253K at ambient pressure.
The freezing point of commercial THPS 75% aqueous solution at ambient pressure is choosen for chemical safety assessment purposes.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -20 °C
Additional information
The melting point of the dried solid THPS (100%) was determined according to OECD 102 guideline under GLP using a capillary tube method.
The study report is well documented and report a melting range of THPS dried (100%) between 54.2 and 81.5°C at ambient pressure.
The freezing temperature of THPS aqueous solution (75%) was determined using the method for determination of crystallizing point (method EC A1) under GLP. The dry ice/ acetone bath was maintained until the temperature has reached approximately -20°C or until the test material solidified.
No solidification appeared until this temperature that gives a freezing temperature for THPS 75% < -20 °C or 253 K at ambient pressure.
The freezing point of THPS 75% aqueous solution at ambient pressure is choosen for chemical safety assessment purposes.
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