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Diss Factsheets

Physical & Chemical properties

Boiling point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 2018-04-23 to 2018-05-14
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
method according to Siwoloboff
Key result
Boiling pt.:
265.2 °C
Atm. press.:
99.86 kPa

Reference Test

The boiling point of water was determined to be 100.3 °C (373.4 K). Measured values were determined to be in the required range (literature value ± 0.5 °C).

Preliminary Test

In the preliminary test the boiling point of the test item was determined to be 277 °C.

Main Test

The metal block was heated to 257 °C. The capillaries containing the test item were placed into the apparatus and the temperature was raised at 0.5 °C/min heating rate until the boiling temperature was reached. Three tests were carried out. At the end of the measurements the color of the samples became light brown. The boiling point was determined to be 265.2 ± 4.07 °C (95 % confidence interval) i.e. 538.4 K.

Conclusions:
Using a linear heating rate of 0.5 °C/min, the boiling point of the test item was determined to be 265.2 ± 4.07 °C or 538.4 K.
Executive summary:

A study was conducted according to OECD test guideline 103, Regulation (EC) No 440/2008 method A.2 and EPA OPPTS 830.8220 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 and was heated in the electronically temperature controlled sample block. In a preliminary test a boiling point of 277 °C was observed. This value was introduced as expected boiling temperature for the main test. The sample was heated from 265 °C at rate 0.5 °C/minute. 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 triplicate. The atmospheric pressure was recorded. The boiling point was determined to be 265.2 °C i.e. 538.4 K at 99.86 kPa.

Description of key information

Using a linear heating rate of 0.5 °C/min, the boiling point of the test item was determined to be 265.2 ± 4.07 °C or 538.4 K.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
265.2 °C

Additional information

A study was conducted according to OECD test guideline 103, Regulation (EC) No 440/2008 method A.2 and EPA OPPTS 830.8220 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 and was heated in the electronically temperature controlled sample block. In a preliminary test a boiling point of 277 °C was observed. This value was introduced as expected boiling temperature for the main test. The sample was heated from 265 °C at rate 0.5 °C/minute. 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 triplicate. The atmospheric pressure was recorded. The boiling point was determined to be 265.2 °C i.e. 538.4 K at 99.86 kPa.