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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The study was conducted according to an internationally recognised method, and under GLP. No deviation was reported. Test substance is adequately specified with purity. Therefore full validation applies.
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes (incl. certificate)
Remarks:
inspected on January 22 and 23, 2013 / signed on March 22, 2013
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
Storage conditions of test material: 11-25 °C, dry, keep container closed.
Boiling pt.:
284 - 286 °C
Atm. press.:
1 013 hPa
Decomposition:
no

Table 4.3/1: Results of the DSC-measurements 

No.

Sample

weight (mg)

Onset of Effect (°C)

Range of effect (°C)

Air pressure (hpa)

Remark

PN9730

14.75

-38.41

-39 to -38 (exo)

1009.3

Cooling

20.07

21 to 22 (exo)

-37.72

-50 to -25 (endo)

Heating

-8.94

-10 to 10 (endo)

22.42

15 to 35 (endo)

285.85

230 to 380 (endo)

PN9731

15.04

-38.68

-39 to -38 (exo)

1009.0

Cooling

19.34

21 to 22 (exo)

-37.90

-50 to -25 (endo)

Heating

-9.12

-10 to 10 (endo)

22.69

15 to 35 (endo)

283.95

230 to 370 (endo)

 

The test item showed an endothermic signal in the temperature range from 230 - 380 °C that can be associated with the boiling of the test item.

For the correction of the boiling temperature to standard pressure the test item was assigned to chemical group 2 (e.g. Hydrocarbons). A correction value 5.125 was used for the temperature range from 283.95 to 285.85 °C.

The lowest measured onset temperature is corrected to the standard pressure to be 284.147 °C and the highest onset temperature to be 286.033 °C. As the corrected onset temperatures in both tests deviate by more than 0.5 K from their mean value of 285.09 °C, the test item has a boiling range from 284 to 286 °C.

No further thermal effects were observed up to the test end temperature of 500 °C. After the DSC measurements a weight loss of about 97 % was detected in both tests.

Executive summary:

The boiling point of the test substance was determined under GLP according to EU Method A.2 and OECD 103, by differential scanning calorimetry (DSC). Two main runs were performed; as the difference between the individual results was greater than the estimated accuracy, the final result was expressed as a range.

The test substance has a boiling range from 284-286 °C corrected to normal atmospheric pressure (1013 hPa) under nitrogen.

Description of key information

Measured boiling range: 283.95-285.85°C. Corrected boiling range to normal atmospheric pressure (1013 hPa) under nitrogen : 284-286 °C

Key value for chemical safety assessment

Additional information

A fully reliable experimental study, conducted according to a recognized OECD/EC method and under GLP, is available. It is considered as a key study. The result being expressed as a range, it cannot be retained as (single) key data.