2-Thiophenecarboxylic acid, 5-chloro-

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

6 - 9 Sep 2005

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Version / remarks:

Test method test method A.2 (section 1.4.6), "determination of the boiling point", described in the EG- guideline 92/69.

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential thermal analysis

Remarks:

The sample is closed up in a crucible made of aluminium with perforated lid and heated up in a DTA-system (heating rate 5 K/min). In comparison with an inert sample the temperature difference and the heat effect is recorded.

Key result

Boiling pt.:

265.4 °C

Decomposition:

no

Remarks on result:

other: No atmospheric pressure is stated.

The key value is the mean of two measured values: 265.6 °C and 265.2 °C.

 

The exothermic decomposition starts at 320 °C (measured with Differential Thermal Analysis: The sample is closed up in a crucible made of glass. The sample is heated up in a DTA-system (heating rate 5 K/min). In comparison with an inert sample (empty crucible) the temperature difference and the heat effect is recorded. Any thermal effect corresponds to a baseline deviation). 

 

Validity criteria for the measurement of the boiling point:

Target condition according to guideline 92/69/EWG A.2:	Actual condition according to the study:	Validity criteria met:
The heating rate should not exceed 10 K/min.	Heating rate was 5 K/min.	Yes
The mean of at least two measurements which are in the range of the estimated accuracy (accuracy for this method according to the guideline is +/- 0.5 K up to 600 K) is reported as the boiling temperature.	Two values were determined - there is no variation between the measured values.	Yes
The measured boiling temperatures and their mean shall be stated and the pressure(s) at which the measurements were made shall be reported in kPa. The pressure should preferably be close to normal atmospheric pressure.	The atmospheric pressure is not stated.	No. Nevertheless, although the pressure is not stated one can assume that the study was performed at atmospheric pressure as the study was performed according to guideline 92/69/EWG A.2, where specifications for the pressure are stated ("the boiling temperature is stated with regard to the ambient pressure during the measurement").

 

Conclusions:

The boiling point of the test substance is 265.4 °C.

Executive summary:

The study was performed to assess the boiling point. The study was conducted in accordance with EEC Method for "determination of the boiling point", Directive 92/69/EEC, method A.2 (section 1.4.6). The boiling point of the test substance is 265.4 °C.

Description of key information

The study was performed to assess the boiling point. The study was conducted in accordance with EEC Method for "determination of the boiling point", Directive 92/69/EEC, method A.2 (section 1.4.6). The boiling point of the test substance is 265.4 °C.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

265.4 °C