5-Brom-2-[(3,4,5-trifluorphenoxy)-difluormethyl]-1,3-difluorbenzene

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

10.05. - 25.07.06

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point/Boiling Range)

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

296 °C

Atm. press.:

1 013.3 hPa

Decomposition:

no

Thermal stability:

The DSC measurement in a closed glass crucible showed an endothermic effect (melting) in the temperature range 35 - 55 °C and no exothermic effect in the temperature range 245 - 280 °C. This exothermal reaction is not seen in the aluminium crucible, it can therefore not be excluded, that this exothermic effect is caused by a reaction of fluorine with the glass crucible.

Boiling point / Boiling range (DSC):

Three measurements in aluminium crucibles with a hole showed an endothermic effect after the melting in the temperature range 220 - 305 °C with an onset temperature of approx. 296 °C.

Table 1: Measured boiling point values

Ident.-No.	Onset / °C	Temperature range / °C	Crucible
23840	296.01	220 - 305	Aluminium with a hole
23843	294.70	260 - 305	Aluminium with a hole
23844	295.66	260 - 305	Aluminium with a hole

For the correction delta-t of the boiling point to standard atmospheric pressure (1013.3 hPa) the equation, table and graphs of H.B. Hass and R.F. Newton in "CRC Handbook of Chemistry and Physics, 74th ed. 1993 -1994", pages 15 -16 and 15 -17 were used.

For the estimation of Q the test item was classified in group 2 (hydrocarbons) according to the table of H.B.Hass and R.F.Newton:

Table 2: Corrected boiling point values

Ident.-No.	Onset / °C	Atmospheric pressure / hPa	Q (group 2)	delta-t / °C	Boiling point at 1013.3 hPa / °C
23840	296.01	1010	5.152	0.1523	296.16
23843	294.70	1010	5.149	0.1520	294.85
23844	295.66	1010	5.151	0.1522	295.81

Conclusions:

The boiling point of the test item at atmospheric pressure (1013.3 hPa) is 296°C.

Executive summary:

A study was conducted according to OECD test guideline 103 and Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using differential scanning calorimetry. The test item and the reference are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded. The test item had a boiling point of 296 °C under atmospheric conditions.

Description of key information

A study was conducted according to OECD test guideline 103 and Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using differential scanning calorimetry. The test item and the reference are heated up from the starting temperature to the final temperature at a constant heating rate in a defined atmosphere (nitrogen). Open crucibles are used as containers for the test item and as empty reference crucible. The quantity of heat absorbed or released is measured and recorded. The test item had a boiling point of 296 °C under atmospheric conditions.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

296 °C