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Physical & Chemical properties

Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-04-23 - 2018-09-27
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to other study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
27 July 1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
31 May 2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
The test item was stored in a tightly closed vessel at room temperature (15.8 - 23.0°C)
Key result
Boiling pt.:
135.89 °C
Decomposition:
no
Remarks on result:
other: no atm. press. stated in the report

PRE-TEST FOLLOWING SIWOLOBOFF

Table: Pre-test following Siwoloboff

Observation   Temperatures in °C
 Individual bubble visible  since 77.8
 More bubbles  since 143
 Bubble chain (Boiling), heating plate turned off  148
 the chain of bubbles broke  146

After cooling down the test item was visually like the original test item.

SECURITY PRE-TEST FOR THE DSC MEASUREMENT

The crucible was found visually unchanged after reaching a temperature of 450°C. The weight of the crucible was recorded with 46.40 mg.

DSC MEASUREMENT OF THE TEST ITEM

In the first measurement not the complete event could be detected therefore for the calculation only the values of the second and third run are taken.

VALIDITY

As the onset values are in range of 0.5 K for determination 2 and 3 the validity criterium is met.

Conclusions:
The boiling point was determined via DSC (differential scanning calorimetry)
Based on the pre-test according to Siwoloboff revealing a boiling point of 146 °C the boiling point was determined via DSC as the endothermic event with:
135.89 ± 0.01 C (409.04 ± 0.01 K), which is the mean from two independent determinations with a peak maximum of 151.37 °C (424.52 K)
Executive summary:

The boiling point was determined via DSC (differential scanning calorimetry) according to OECD 103 resp. EU A.2 under GLP conditions.

Based on the pre-test according to Siwoloboff revealing a boiling point of 146 °C the boiling point was determined via DSC as the endothermic event with:

135.89 ± 0.01 C (409.04 ± 0.01 K), which is the mean from two independent determinations with a peak maximum of 151.37 °C (424.52 K)

The result of the first valid determination is stated with: 135.90 °C (409.05 K) and

The result of the second valid determination is stated with: 135.88 °C (409.03 K)

The range of the event was detected with: 97.47 °C to 188.39 °C (370.62 K to 461.54 K)

These values are the minimum and maximum value from two independent determinations.

Description of key information

The boiling point was determined via DSC (differential scanning calorimetry) according to OECD 103 resp. EU A.2 under GLP conditions.

Based on the pre-test according to Siwoloboff revealing a boiling point of 146 °C the boiling point was determined via DSC as the endothermic event with:

135.89 ± 0.01 C (409.04 ± 0.01 K), which is the mean from two independent determinations with a peak maximum of 151.37 °C (424.52 K)

The result of the first valid determination is stated with: 135.90 °C (409.05 K) and

The result of the second valid determination is stated with: 135.88 °C (409.03 K)

The range of the event was detected with: 97.47 °C to 188.39 °C (370.62 K to 461.54 K)

These values are the minimum and maximum value from two independent determinations.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
135.89 °C

Additional information

No pressure is stated. Nevertheless the measured boiling point was obverved at room conditions, therefore a pressure of 101 325 Pa is applicable as key value for the CSA.