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EC number: 219-774-8 | CAS number: 2528-39-4
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 16-17 Dec 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Rheinland-Pfalz Landesamt für Umwelt, Wasserwirtschaft und Gewerbeaufsicht, Mainz, Germany
- Type of method:
- method to determine freezing temperature
- Remarks:
- storage at Super Deep/Deep Freezer
- Melting / freezing pt.:
- < -20 °C
- Atm. press.:
- ca. 1 013 hPa
- Decomposition:
- no
- Sublimation:
- no
Reference
In a pre-test, the test item SP-173 was still liquid after storage for 1 day at –25.4 °C and solidification occurred only at -80 °C. The determination of the melting- / freezing point does not need to be conducted below a lower limit of -20 °C. Therefore, the freezing point is stated as above.
No observations were made which might cause doubts on the validity of the study outcome. Therefore, the result of the study is considered valid.
The following deviation from the study plan was documented: In the pre-test the test item was stored at 7.4 °C instead of 5 °C and
–25.4 °C instead of -20 °C. This is uncritical as the result of the pre-test is clear, because the test item was liquid even at –25.4 °C.
Description of key information
< -20 °C (OECD 102, EU A.1)
Key value for chemical safety assessment
Additional information
The melting point of the substance trihexyl phosphate (CAS No. 2528-39-4) is in the range that allows estimation that it is very low (below -20 °C).
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