Alkanes, C10-13-iso-

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

21 Nov 2017 - 11 Jan 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

GLP guideline study

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

adopted in 2008

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

adopted in 1995

Qualifier:

according to guideline

Guideline:

other: CIPAC MT1

Qualifier:

according to guideline

Guideline:

other: EPA 830.7200

GLP compliance:

yes (incl. QA statement)

Remarks:

Hess. Ministerium für Umwelt, Klimaschutz, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

< -100 °C

Atm. press.:

ca. 1 000 hPa

Results
During the cooling phase to -100 °C, no exothermic (freezing) could be detected. During the heating phase, starting at -100 °C, an endothermic effect was observed in the temperature range of 60 to 200 °C which can be assigned to the boiling of the test item.

DSC-measurement results

Sample weight [mg]	Onset of effect [°C]	Range of effect [°C]	Weight loss [mg]	Atmospheric pressure [hPa]
9.16	96.75	60 – 200	9.13	1003
14.64	103.07	70 - 200	14.64	998

The freezing /melting point of the test item is < -100 °C.

Measurements by the test tube method (melting point)
To verify the results of the DSC measurement, an additional measurement with the test tube method was performed in the temperature range of -138.1 to -109 °C. Therefore, 5.49 g of test item was cooled down by liquid nitrogen to a temperature of -138.1 °C and slowly heated up. The observations during the test with the test tube method are summarized below.

Observations during the test with the test tube method

Temperature [°C]	Observation
Start at 23.2	Test item liquid
-138.1	Test item solid, crystalline appearance
-115.0	Test item solid, crystalline appearance
-114.0	Test item highly viscous liquid
-109.2	Test item liquid

According to the observations during the test with the test tube method, the freezing/melting point is < -100 °C. This result is only an indication and therefore not sufficient for an accurate determination of the freezing point/melting point.

Conclusion
The test item has a freezing/melting point of < -100 °C at atmospheric pressure (998 – 1003 hPa).

Conclusions:

The test item has a freezing/melting point of < -100°C at atmospheric pressure (998 – 1003 hPa).

Executive summary:

The test item has a freezing/melting point of < -100°C at atmospheric pressure (998 – 1003 hPa).

Description of key information

The substance has a freezing/melting point of < -100 °C at atmospheric pressure (DSC, OECD 102)