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Physical & Chemical properties

Boiling point

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Administrative data

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1990-08-15 to 1990-12-13
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point/Boiling Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
method according to Siwoloboff
Key result
Boiling pt.:
255.4 °C
Atm. press.:
1 013.25 hPa
Decomposition:
no

Presentation of the results including calculation and statistical methods

1. experiment: 255.6 °C

2. experiment: 255.2 °C

 

Mean: 255.4 °C 

Correction value above 220 °C (533K) according to the calibration certificate: 0.3 °C (K) 

Resulting boiling point: 255.7 °C 

The deviation of the two measurements was much smaller than the range of ± 2 K specified in the method. Thus, the result was therefore be regarded as sufficiently accurate

Conclusions:
The boiling point was determine to be 255.7 °C at 1013.25 hPa.
Executive summary:

A study was conducted according to Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using the principle according to Siwoloboff.

A small amount of the test item was filled in a capillary tube to a height of 5-10 mm and was heated in the liquid bath. The sample was heated to 518 K (244.85 °C), then at rate 1K/minute was used. The sample was observed visually for any possible changes in appearance, consistency and colour. The phase transition from liquid to vapour was deduced by the continuous formation of steam bubbles leaving the inserted boiling capillary. This determination was done in duplicate. The boiling point was determined to be 255.7 °C at 1013.25 hPa. The deviation of the two measurements was much smaller than the range of ± 2 K specified in the method. Thus, the result was therefore be regarded as sufficiently accurate

Description of key information

The boiling point was determined to be 255.7 °C at 1013.25 hPa (reference 4.3 -1).

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
255.7 °C

Additional information

A study was conducted according to Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using the principle according to Siwoloboff. (reference 4.3 -1). A small amount of the test item was filled in a capillary tube to a height of 5-10 mm and was heated in the liquid bath. The sample was heated to 518 K (244.85 °C), then at rate 1K/minute was used. The sample was observed visually for any possible changes in appearance, consistency and colour. The phase transition from liquid to vapour was deduced by the continuous formation of steam bubbles leaving the inserted boiling capillary. This determination was done in duplicate. The boiling point was determined to be 255.7 °C at 1013.25 hPa. The deviation of the two measurements was much smaller than the range of ± 2 K specified in the method. Thus, the result was therefore be regarded as sufficiently accurate