Reaction Mass of 3,8-dimethyl-5-(prop-1-en-2-yl)-1,2,3,3a,4,5,6,7-octahydroazulene and 4,8a,9,9-octamethyldecahydro-1,6-methanonaphthalen-1-ol

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

08-09 May 2018

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.

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 15 and 16 November 2017/ Signed on 15 May 2018

Type of method:

method according to Siwoloboff

Key result

Boiling pt.:

254.3 °C

Atm. press.:

>= 98 919 - <= 99 018 Pa

Decomposition:

yes

Pre test boiling point:

When heating a sample of the test item in an open test tube (10*100 mm) with a gas burner individual bubble was observed at 258 °C and more bubbles were visible at 273 °C. At 294 °C super heating was occurred, the gas burner was turned off.

After cooling down the test item was slightly darker (dark brown).

Main test Siwoloboff method:

Observations and measured values are presented in the following table.

Table          Observations Main Test

Observations	First Determination Atmospheric pressure 99018 Pa	Second Determination Atmospheric pressure 98919 Pa
When the sample tube was set into the aluminium block, the condensate was visible	245.0 °C	245.0 °C
Individual bubble visible	Since 247°C	Since 247°C
The colour was slightly darker	Since 258°C	Since 258°C
Lots of small bubbles	Since 265°C	Since 265°C
Bubble chain, turned off gas burner, colour was pale brown	276.2 °C	274.5 °C
The chain broke	253.7 °C	254.8 °C
The test item stay pale brown instead of yellow (original colour) ,see photo	After cooling down

Since boiling under decomposition was observed, the result is stated without Sidney-Young correction.

The colour change during determination confirms the decomposition.

Therefore boiling point under decomposition of the test item should be stated as 254.3 ± 0.8 °C (527.4 ± 0.8 K).

Conclusions:

The determination of boiling point of the test item was determined with the Siwoloboff method. The test item had changed its colour to pale brown during the tests. Therefore, the boiling point should be stated as 254.3 ± 0.8 °C (corresponding to 527.4 ± 0.8 K) under decomposition. This value is the mean of two independent determinations. As the test item decomposed, a correction to standard pressure following Sidney-Young was not applied.

Executive summary:

The determination of boiling point of the test item was determined with the Siwoloboff method. The test item had changed its colour to pale brown during the tests. Therefore, the boiling point should be stated as 254.3 ± 0.8 °C (corresponding to 527.4 ± 0.8 K) under decomposition. This value is the mean of two independent determinations. As the test item decomposed, a correction to standard pressure following Sidney-Young was not applied.

Description of key information

The boiling point of test item should be stated as: 254.3 ± 0.8 °C (527.4 ± 0.8 K) under decomposition of the test item.

This value is the mean of two independent determinations without Sydney-Young correction.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

254.3 °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.