Registration Dossier

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
August 10,2018 - August 14,2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
The sample was tested as received. No further preliminary treatment such as drying or milling was performed.
Key result
Melting / freezing pt.:
85.6 °C
Atm. press.:
1 013.25 hPa
Decomposition:
no
Sublimation:
no

Three DSC measurements with a heating rate of 10 K/min showed an endothermal effect (melting) in the temperature range of 75-110°C. Additionally the first measurement also showed an exothermal effect (175 - 225 °C) and another endothermal effect (360 - 500 °C). The onset temperature (see Table 1) was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline.

Table 1: Melting Point (DSC measurements)

 

Ident No.

 

Test item / mg

Starting temperature / °C

 

Final test temperature / °C

 
 

Temperature

range (endothermal)

/

°C

 

Onset

(melting) /

°C

 Crucible  

Observations

after the

measurement

 38142 8.46

25

500

75 - 110

85.47

Aluminium

with a hole

 ----

38143 

9.39

25

95

80 - 95

85.71

Aluminium

with a hole

Test item was

a solidified

melt, no mass loss

38146

11.35

25

140

75 - 105

85.53

Aluminium

with a hole

Test item was

a solidified

melt, no mass loss

The endothermal effect consisted of two steps. However as the test item was already a melt after the first step only this was considered for the melting point. The test item had a melting point of 85.6 °C.

Conclusions:
The test item had a mean melting point of 85.6 °C.
Executive summary:

A study was conducted according to OECD TG 102 and Regulation (EC) No 440/2008 method A.1 to determine the melting point of the test item using differential scanning calorimetry. The test item was weighed into an aluminium crucible under an inert atmosphere (nitrogen). Open crucibles are used as containers for the test item and asThree DSC measurements with a heating rate of 10 K/min showed an endothermal effect (melting) in the temperature range of 75-110°C. Additionally the first measurement also showed an exothermal effect (175 – 225°C) and another endothermal effect (360 – 500°C). The endothermal effect consisted of two steps. However as the test item was already a melt after the first step only this was considered for the melting point. The test item had a melting point of 85.6 °C.

Description of key information

The test item had a mean melting point of 85.6 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
85.6 °C

Additional information

A study was conducted according to OECD TG 102 and Regulation (EC) No 440/2008 method A.1 to determine the melting point of the test item using differential scanning calorimetry. The test item was weighed into an aluminium crucible under an inert atmosphere (nitrogen). Open crucibles are used as containers for the test item and asThree DSC measurements with a heating rate of 10 K/min showed an endothermal effect (melting) in the temperature range of 75-110°C. Additionally the first measurement also showed an exothermal effect (175 – 225°C) and another endothermal effect (360 – 500°C). The endothermal effect consisted of two steps. However as the test item was already a melt after the first step only this was considered for the melting point. The test item had a melting point of 85.6 °C (reference 4.2 -1).