2-isopropyl-9H-thioxanthen-9-one

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

28 June 2017 to 06 July 2017

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)

Version / remarks:

1996

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

>= 411 - <= 414 °C

Atm. press.:

1 013 hPa

Decomposition:

no

- During the heating phase a distinct endothermic effect was observed in the temperature range of 60 to 90 °C, which can be assigned to the melting of the test material.

- The test material showed a second endothermic signal in the temperature range of 280 to 430 °C that can be assigned to the boiling of the test material.

- For the correction of the boiling temperature to standard pressure the test material was assigned to chemical group 1 (e.g. antraquinone). A a correction value f = 5.15 was used for the temperature of 410 °C.

- The lowest measured onset temperature is corrected to the standard pressure to be 411.36 °C and the highest onset temperature to be 414.13 °C. As the corrected onset temperatures in three tests deviate by more than 0.5 K from their mean value of 412.69 °C, the test material has a boiling range of 411 to 414 °C.

- No further thermal effects were observed up to the test end temperature of 500 °C.

Table 1: Results of the DSC-Measurements

No.	Sample weight (mg)	Onset of effect (°C)	Range of effect (°C)	Weight loss (mg)	Atmospheric pressure (hPa)
1	12.42	75.03 409.89	60 to 90 (endo) 280 to 430 (endo)	12.30	987.6
2	20.28	74.07 413.65	60 to 90 (endo) 350 to 430 (endo)	20.24	1004.9
3	14.90	74.68 412.12	60 to 90 (endo) 350 to 430 (endo)	14.87	1005.0

Conclusions:

Under the conditions of this study the test material has a boiling range from 411 to 414 °C at atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry.

Executive summary:

The boiling point of the test material was investigated in accordance with the standardised guidelines OECD 103, EU Method A.2 and EPA OCSPP 830.7220, under GLP conditions.

The determination was performed via Differential Scanning Calorimetry (DSC). The prepared crucibles (crucible with test material and reference crucible) were placed in the DSC apparatus. The tests were started at ambient temperature, where the test material was a solid. The temperature was then increased up to 500 °C at a constant heating rate of 10 K/min under an inert atmosphere.

During the heating phase a distinct endothermic effect was observed in the temperature range of 60 to 90 °C, which can be assigned to the melting of the test material. The test material showed a second endothermic signal in the temperature range of 280 to 430 °C that can be assigned to the boiling of the test material.

The lowest measured onset temperature is corrected to the standard pressure to be 411.36 °C and the highest onset temperature to be 414.13 °C. As the corrected onset temperatures in three tests deviate by more than 0.5 K from their mean value of 412.69 °C, the test material has a boiling range of 411 to 414 °C. No further thermal effects were observed up to the test end temperature of 500 °C.

Under the conditions of this study the test material has a boiling range from 411 to 414 °C at atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry.

Description of key information

Under the conditions of this study the test material has a boiling range from 411 to 414 °C at atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

411 °C

Additional information

The boiling point of the test material was investigated in accordance with the standardised guidelines OECD 103, EU Method A.2 and EPA OCSPP 830.7220, under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

The determination was performed via Differential Scanning Calorimetry (DSC). The prepared crucibles (crucible with test material and reference crucible) were placed in the DSC apparatus. The tests were started at ambient temperature, where the test material was a solid. The temperature was then increased up to 500 °C at a constant heating rate of 10 K/min under an inert atmosphere.

During the heating phase a distinct endothermic effect was observed in the temperature range of 60 to 90 °C, which can be assigned to the melting of the test material. The test material showed a second endothermic signal in the temperature range of 280 to 430 °C that can be assigned to the boiling of the test material.

The lowest measured onset temperature is corrected to the standard pressure to be 411.36 °C and the highest onset temperature to be 414.13 °C. As the corrected onset temperatures in three tests deviate by more than 0.5 K from their mean value of 412.69 °C, the test material has a boiling range of 411 to 414 °C. No further thermal effects were observed up to the test end temperature of 500 °C.

Under the conditions of this study the test material has a boiling range from 411 to 414 °C at atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry.