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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:
03/AUG/04 - 28/OCT/04
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
yes
Remarks:
The pressure measured by KNMI (Royal Dutch Meteorological Institute), De Bilt, the Netherlands, was used as the pressure during the performance of the test at the Utrecht University. The study integrity was not adversely affected by this deviation.
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
yes
Remarks:
The pressure measured by KNMI (Royal Dutch Meteorological Institute), De Bilt, the Netherlands, was used as the pressure during the performance of the test at the Utrecht University. The study integrity was not adversely affected by this deviation.
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
Asahiklin AE-3000, molecular weight 200.07
CAS 406-78-0
Clear colourless liquid
Batch 50407070
Purity: 99.985%
The test substance was stored in a refrigerator in the dark under stable conditions
The test substance expiry date was the 07 July 2005
Key result
Boiling pt.:
56 °C
Atm. press.:
1 010 hPa

The standard boiling temperature is defined as the temperature at which the vapour pressure of a liquid is the same as the standard pressure (101.325kPa). The boiling temperature of a pure substance is evaluated from a DSC-curve as the extrapolated onset temperature of the endothermic evaporation peak - i.e. as the cross point of the extrapolated base line and the linear part of the rising section of the evaporation peak.

DSC-curves formed from the experimental data showed large endothermic effects, probably caused by evaporation of the test substance, between 50°C and 80°C for experiment 1 and 47°C and 80°C for experiment 2. The extrapolated onset temperature of both evaporation peaks (a.k.a the boiling point) was determined to be 56°C.

Conclusions:
The boiling temperature of 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether was determined to be 56°C (329K)
Executive summary:

An experiment was carried out to determine the boiling point of 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether. 15.00mg and 13.42mg of the test substance was heated from 25°C to 125°C at a rate of 20°C/minute. The boiling temperature of the substance was then evaluated by a DSC-curve formed from the experimental data. From the extrapolated DSC-curve, the boiling temperature of 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether was determined as 56°C.

Description of key information

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
56 °C

Additional information