Santalum austro-caledonicum, ext.

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

9 May 2017 - 9 June 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

The study was conducted according to an internationally recognised method. Test substance is adequately characterised. Therefore full validation applies.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Version / remarks:

2008

Deviations:

no

Principles of method if other than guideline:

Not applicable

GLP compliance:

yes (incl. QA statement)

Remarks:

Inspected on 13 and 14 October 2014 / Signed on 8 April 2015

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

> 309.92 °C

Atm. press.:

other: not specified but assumed to be atmospheric pressure

Decomposition:

yes

Decomp. temp.:

> 301.38 °C

Pre-test following Siwoloboff:

Temp.	Observation
60 °C	Single bubbles were observed
150 °C	No more bubbles were observed
320 °C	A boiling chain was observed
321.6 °C	Gas burner switched off
253.7 °C	The chain broke

After cooling down no signs for decomposition were observed.

Security Pre-test for the DSC instrument:

The crucible was found visually unchanged after reaching a temperature of 420°C. The weight was recorded with 45.85 mg. the crucible was empty no further heating was performed.

DSC measurement:

In two determinations one exothermic event was detected which is a sign of the decomposition. In the second determination a higher temperature range was performed showing similar graph like the first determination with an intense baseline rising.

Therefore, the results were considered as boiling under decomposition.

Decomposition begins	in °C	in K
1 Determination	303.36	576.51
2 Determination	301.38	574.53
Begin	301.38	574.53
Boiling under decomposition	in °C	in K
1 Determination	316.21	589.36
2 Determination	309.92	583.07
Begin	309.92	583.07

Conclusions:

No boiling point temperature was determined as the test item decomposed.
The beginning of boiling under decomposition was determined under these circumstances as the exothermic event with 309.92°C (583.07K).

Executive summary:

The study was performed in order to determine the boiling point of test item according OECD 103, resp. EU A.2 guideline, usind Differential Scanning Calorimetry.

No boiling point temperature was determined as the test item decomposed.

The beginning of decomposition process was indicated with the event marker function as: 301.38 °C (574.53 K).

However a thermal transition was observed, i.e. boiling point with decomposition.

The beginning of boiling under decomposition was determined under these circumstances as the exothermic event with 309.92°C (583.07K).

These results are from two independent determinations.

Description of key information

No boiling point temperature was determined as the test item decomposed.

The beginning of decomposition process was indicated as: 301.38 °C (574.53 K).

However a thermal transition was observed, i.e. boiling point with decomposition.

The beginning of boiling under decomposition was determined under these circumstances as the exothermic event with 309.92°C (583.07K).

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

309.92 °C

Additional information

A fully reliable experimental study, conducted according to OECD 103/ EU A2 guideline is available.

It is considered as a key study, and the result is retained as key data.