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Diss Factsheets

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:
supporting study
Study period:
2017-06-30
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
method according to Siwoloboff
Key result
Atm. press.:
1 013.25 hPa
Decomposition:
yes
Decomp. temp.:
>= 204 °C
Remarks on result:
not determinable

Starting the measurement the aim was to find the temperature where the test item melted. At 204 °C a small amount of the test item formed a light brown melt at the bottom of the sample tube, but most of it moved towards the upper part of the sample tube and hardened.

Table 1: Observation

Temperature
(°C)		 Observation

190

white solid, no change was

observed

195

 slightly brown, solid

198

 light brown, solid

200

 light brown, solid

202

 light brown, solid

204

 small amount of light brown melt at the botton of the sample tube, most of the test item moved towards the upper part of the sample
tube and hardened
Conclusions:
Based on the observations it was concluded that the test item started to decompose immediately after melting and no boiling point could be determined.
Executive summary:

A study should be performed according to OECD TG 103 and Regulation (EC) No. 440/2008, method A.2 in order to determine the boiling point of the test item by using the Siwoloboff method. At 204 °C a small amount of the test item formed a light brown melt at the bottom of the sample, but most of it moved towards the upper part of the sample tube and hardened. Based on this observation, it was concluded that the test item started to decompose immediately after melting and the boiling point could not be determined.

Description of key information

Based on the observations it was concluded that the test item started to decompose immediately after melting and no boiling point could be determined.

Key value for chemical safety assessment

Additional information

A study should be performed according to OECD TG 103 and Regulation (EC) No. 440/2008, method A.2 in order to determine the boiling point of the test item by using the Siwoloboff method. At 204 °C a small amount of the test item formed a light brown melt at the bottom of the sample, but most of it moved towards the upper part of the sample tube and hardened. Based on this observation, it was concluded that the test item started to decompose immediately after melting and the boiling point could not be determined (reference 4.3-1).