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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
March 13, 2018 to May 02, 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
> 200 °C
Remarks on result:
other:
Remarks:
The measurement with the capillary method and the visual inspections showed no boiling after the melting effect and before the decomposition started.

Melting point / melting range: DSC measurement

Two DSC measurements with a heating rate of 10 K/min showed a multistage endothermal effect in the temperature range of 200 – 290 °C. The results of the DSC measurements are summarized in Table 1.

Table1: Melting point (DSC measurements)

Ident No.

Test item /

mg

Starting temperature /

°C

Final test temperature /

°C

Temperature range (endo-thermal) /

°C

Onset / °C

Crucible

Observations after the measurement

36863

19.77

25

500

200 – 290

multi-stage

Aluminium with a hole

Black residue

Mass loss: 56%

36867

13.07

25

300

200 – 265

multi-stage

Aluminium with a hole

Black residue

Mass loss: 36%

An additional measurement with the capillary method was performed in order to clarify the melting range.

Melting point / melting range: capillary tube in a metal block

A measurement with the capillary method was performed to clarify the results of the DSC measurements. The filling height of the test item was approximately 5 mm.

The results are summarized in Table 2.

Table2: Results of the capillary method

No.




Set point /
°C

Heating rate / K/min

End
point /
°C

Remarks

1

180

10

330

Approx. 205 °C: Test item started to melt

Approx. 221 °C: Test item was fully melted

Approx. 227 °C: The melt moved upwards in the capillary

Approx. 241  C: Gas formation

Approx. 280 - 292 °C: Liquid solidified as a black residue

Approx. 292 – 330 °C: No further change

2

200

1

221

Approx. 202 °C: Test item started to melt

Approx. 212 °C: Test item was a full black melt.

Approx. 220  C: Bubble formation

Approx. 221 °C: No further change

Under consideration of the results from the DSC measurements and the capillary method it was concluded that the test item started to melt at approx. 200 °C. Directly afterwards decomposition started.

Boiling point / boiling range: DSC measurement

The measurement with the capillary method and the visual inspections showed no boiling after the melting effect and before the decomposition started.

The test item had no boiling point under atmospheric conditions.

Executive summary:

The test item had no boiling point under atmospheric conditions.

Description of key information

The test item had no boiling point under atmospheric conditions.

Key value for chemical safety assessment

Additional information

The measurement with the capillary method and the visual inspections showed no boiling after the melting effect and before the decomposition started.

The test item had no boiling point under atmospheric conditions.