6,6'-(Ethane-1,2-diylbis(azanediyl))bis(dibenzo[c,e][1,2]oxaphosphinine-6-oxide)“

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2016-10-05 - 2016-11-03

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

method according to Siwoloboff

Key result

Decomposition:

yes

Decomp. temp.:

269.9 °C

A small amount of the test item was filled into a small test tube and was heated in an aluminium block from room temperature with a gas burner.

The following observations were observed:

Observations	Temperature
Colour yellowish, solid	250 °C
Start to melt to a yellow-brown liquid	280 °C
Complete melted	296 °C
Formation of bubbles, colour from time to time darker	356 °C
Colour nearly black, formation of deposit on the side wall of the test tube	401 °C

After cooling down: The test item was hard and charred. The determination of boiling point could not be determined. The test item decomposed while melting.

Conclusions:

The test item EDA-DOPO showed a decomposition while melting, no boiling point could be determined. Decomposition was indicated by colour change and in the pre-test, the test item also charred.

Executive summary:

Findings and Results: 

First, a small amount was heated in a test tube in the aluminium block in the pre-test. Decomposition was observed, indicated by colour change and physical state change (the test item charred).

The determination of the main test of the boiling point following theSiwoloboffmethod was performed in duplicate. In both determinations, decomposition was detected. 

The decomposition temperature was determined with 269.9 ± 0.0 °C (543.1 ± 0.0 K). This value is the means of two independent determinations. 

The test item showed signs of decomposition while melting, indicated by colour change. Therefore, no boiling point could be determined.

Description of key information

The test item EDA-DOPO showed a decomposition while melting, no boiling point could be determined. Decomposition was indicated by colour change and in the pre-test, the test item also charred.

Additional information

The test item EDA-DOPO showed a decomposition while melting, no boiling point could be determined. Decomposition was indicated by colour change and in the pre-test, the test item also charred.