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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:
7 Mars to 29 Mars 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
The study was conducted according to an internationally recognised method, and under GLP. Substance ID is adequately specified. Therefore, full validation applies.
Reason / purpose:
reference to same study
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
GLP compliance:
yes (incl. certificate)
Remarks:
inspected on 13 and 14 October 2014 / signed on 08 April 2015
Type of method:
method according to Siwoloboff
Key result
Boiling pt.:
189.2 °C
Atm. press.:
101.325 kPa
Remarks on result:
other: 189. 2 ± 0.4 °C (corresponding to 462.3 ± 0.4 K).

Observations and measured values are presented in the following table.

Table 4.3/1-Results

Determination

Boiling Point

Atmospheric Pressure

First determination

188.0 °C (461.2 K)

99169 Pa

Second determination

188.5 °C (461.7 K)

99161 Pa

Table 4.3/2.-Observations

Observation

First

determination

Second

determination

Boiling chain/

heating switched off

220.0 °C /

221.6°C

219.5 °C /

220.1°C

After cooling down

The tinge of yellow was more intense

Corrected values following Sidney-Young: to calculate the boiling temperature at standard pressure (101.325kPa)

Table 4.3/3.-Corrected values to the standard presure 101.325kPa

 

Boiling point

Pressure in Pa

Corrected Boling point

First determination

188.0 °C (461.2 K)

99169 Pa

188.9 °C (462.0 K)

Second determination

188.5 °C (461.7 K)

99161 Pa

189.4 °C (462.5 K)

Mean

 

 

189.2 °C (462.3 K)

Mean ± standard deviation (after correction following Sydney Young) = 189.2 ± 0.4 °C (462.3 ± 0.4 K) at standard pressure (101.325 kPa).

Conclusions:
The initial boiling temperature of the test item has been determined to be ca 189.2 ± 0.4 °C (462.3 ± 0.4 K), corrected to standard pressure (101.325 kPa).
Executive summary:

The initial boiling point of the test item was measured under GLP according to OECD 103 / EU A2 guideline, by Siwoloboff. The test item was filled into a sample tube. The sample tube was then set into the aluminium block at 185.0 °C (first determination) and at 186.0 °C (second determination). For the increase of the temperature, a temperature gradient of 1 °C /min was maintained.When bubbles rose constantly on the capillary, heating was turned down, and, cooling slowly. The moment at which the chain of bubbles broke was recorded (with its atmospheric pressure) as boiling point .The determination was performed in duplicate.

The tinge of yellow was more intense after cooling down for each determination.

Description of key information

The initial boiling temperature of the test item has been determined to be ca 189. 1 ± 0.4 °C, corrected to standard pressure (101.325 kPa).

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
189.2 °C

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 initial boiling point of the test substance was measured using the Siwoloboff method. The test item was filled into a sample tube. The sample tube was then set into the aluminium block at 185.0 °C (first determination) and at 186.0 °C (second determination). For the increase of the temperature, a temperature gradient of 1 °C /min was maintained. When bubbles rose constantly on the capillary, heating was turned down, and, cooling slowly. The moment at which the chain of bubbles broke was recorded (with its atmospheric pressure) as boiling point .The determination was performed in duplicate.

The tinge of yellow was more intense after cooling down for each determination.