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Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017-07-12 - 2018-03-06
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
1998
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Remarks:
+ capillary method
Key result
Atm. press.:
1 016.1 hPa
Decomposition:
yes
Decomp. temp.:
ca. 130 °C
Remarks on result:
other:
Remarks:
No melting point up to decomposition starting at a temperature of approx. 130 °C

Melting and Boiling Point (DSC)

The test item showed an endothermic effect starting at a temperature of 50 °C. This effect leads into an exothermic effect starting at 190 °C with an energy release of -30 J/g. A second endothermic effect is detected starting at 250 °C.

Table 1:    Results of the DSC-measurements

No.

Sample weight / mg

Onset of Effect / °C

Range of effect / °C

Weight loss / mg

Atmospheric pressure / hPa

Remark

PN13844

14.61

50
190
250

+180
-30
+20

4.34

1016.1

PN13845

15.18

50
190
250

+190
-30
+20

4.42

1016.1

During the heating phase two endothermic effects were detected, which cannot be clearly assigned to a melting or a boiling of the test item.

Measurements by the Capillary Method

To verify the results of the DSC measurement, three additional measurements with the capillary method (Apparatus: Stuart Melting Point SMP30) were performed in the temperature range of 25 – 400 °C with a heating rate of 10 K/min. According to the observations during the tests with the capillary method, no melting or boiling of the test item could be observed up to the maximum test temperature of 400 °C.Since the test item contains 7.42 % water, it can be assumed, that the first endothermic effect is caused by the drying of the test item. Due to this fact it can be stated that the test item has no melting and boiling point up to its decomposition starting at 130 °C.

Conclusions:
The test item CI Solubilised Sulphur Black 1 has no melting point up to its decomposition starting at a temperature of approx. 130 °C as determined by differential scanning calorimetry and capillary method according to Regulation EC No. 440/2008 Method A.1., OECD Test Guideline 102 (1995), EPA OCSPP 830.7200 (1998) and CIPAC MT 1 (2009).

Executive summary:

The test item CI Solubilised Sulphur Black 1 has no melting point up to its decomposition starting at a temperature of approx. 130 °C as determined by differential scanning calorimetry and capillary method according to Regulation EC No. 440/2008 Method A.1., OECD Test Guideline 102 (1995), EPA OCSPP 830.7200 (1998) and CIPAC MT 1 (2009).

Description of key information

The test item Solubilised Sulphur Black 1 has no melting point up to its decomposition starting at a temperature of approx. 130 °C as determined by differential scanning calorimetry and capillary method according to Regulation EC No. 440/2008 Method A.1., OECD Test Guideline 102 (1995), EPA OCSPP 830.7200 (1998) and CIPAC MT 1 (2009).

Key value for chemical safety assessment

Additional information

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