Ethylene bis[3,3-bis(3-tert-butyl-4-hydroxyphenyl)butyrate]

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2013

Reliability:

2 (reliable with restrictions)

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Boiling pt.:

ca. 346 - ca. 348 °C

Atm. press.:

1 013.25 hPa

Boiling Point

The DSC runs PN4746 and PN4749 in aluminium crucibles under nitrogen are shown in

figure 2. In the temperature range of 70 - 120°C an endothermic effect could be observed. In

correlation with the CoA, supplied by the Study Monitor this effect corresponds to the Glas

Transition of the test item. A second endothermic effect is observed in the temperature range

of 320 - 460°C, which can be attributed to the boiling of the test item.

In both measurements a mass loss after the complete run in the temperature range from

room temperature to 500°C of 88 - 90 % could be observed.

Table 2: Results on melting and boiling point

No.	Sample weight /mg	Onset /°C	Energy / J/g
PN4746	12.86	70310 (Onset: 347.66)	+20 (endothermic) +370 (endothermic)
PN4749	12.12	70 330 (Onset: 349.13)	+20 (endothermic)+330 (endothermic)

For the correction of the boiling temperature to normal pressure the test item was assigned

to chemical group 3 (e.g. Esters). According to appendix 8.2 a correction value <jl = 5.50 was

used for a temperature range from 340°C.

The lowest measured onset temperature is corrected to the normal pressure to be 346.85 °C

and the highest onset temperature to be 348.31 °C. The test item has a boiling range of

346 - 348°C at atmospheric pressure (1013.25 hPa).

Measurements by the capillary method:

To verify the results of the DSC-measurement and for clarification of the phase transition of

the first endothermic effect, an additional measurement with the capillary method (Apparatus:

Buchi melting Point B-540) was performed. The temperature range of 40 - 400°C was

investigated. Before the test the pills were grounded by using a pistil and mortar

Conclusions:

The test item HOSTANOX 0 3 PILLS has a boiling range of 346 - 348°C at atmospheric
pressure (1013.25 hPa).

Executive summary:

In a test according to OECD Test Guideline 103, and EC No. 440/2008 Part A. Method A.2.,

the test item HOSTANOX 0 3 PILLS showed a boiling range at atmospheric pressure

(1013.25 hPa) of 346 - 348 'C.

Description of key information

In a test according to OECD Test Guideline 103, and EC No. 440/2008 Part A. Method A.2.,
the test item HOSTANOX 0 3 PILLS showed a boiling range at atmospheric pressure
(1013.25 hPa) of 346 - 348 'C.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

347 °C