Reaction mass of (2R*,4R*,4aR*,9bS*)-2,4-dimethyl-4,4a,5,9b-tetrahydroindeno[1,2-d][1,3]dioxine and (2R*,4R*,4aS*,9bR*)-2,4-dimethyl-4,4a,5,9b-tetrahydroindeno[1,2-d][1,3]dioxine

Boiling point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2020-11-11 to 2020-11-17

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7220 (Boiling Point / Boiling Range)

Version / remarks:

1996

Deviations:

no

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)

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Remarks:

confirmed by the capillary method

Key result

Boiling pt.:

270.5 °C

Atm. press.:

1 013 hPa

Decomposition:

yes

Remarks:

The test item starts colourizing at this temperature, which indicates the beginning of decomposition.

Decomp. temp.:

270.5 °C

The test item starts colourizing at this temperature, which indicates the beginning of decomposition.

Conclusions:

The test item has a boiling point of 270.5 °C at atmospheric pressure (1013 hPa) as determined by Differential Scanning Calorimetry and confirmed by the capillary method according to Regulation (EC) No 440/2008 Method A.2. and OECD Test Guideline 103 (1995).

Executive summary:

The test item has a boiling point of 270.5 °C at atmospheric pressure (1013 hPa) as determined by Differential Scanning Calorimetry and confirmed by the capillary method according to Regulation (EC) No 440/2008 Method A.2. and OECD Test Guideline 103 (1995). The test item starts colourizing at this temperature, which indicates the beginning of decomposition.

Reference 2

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

21-Aug-2014 to 25-Aug-2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7220 (Boiling Point / Boiling Range)

GLP compliance:

no

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

> 249 - < 267 °C

Atm. press.:

1 013 hPa

Results

In the thermograms of the two DSC runs (nos. PN7337 and PN7338) an endothermic (melting) effect was observed in the temperature range of -50 °C to - 30 °C. Between 150 to 310 °C a second endothermic effect (boiling) could be detected.

Results of the DSC measurements

No.	Sample weight (mg)	Onset of effect (°C)	Range of effect (°C)	Weight loss (mg)	Atmospheric pressure (hPa)
PN7337	11.62	-40.52 266.44	-50 to -35 (endo) 150 to 310 (endo)	11.61	1004.9
PN7338	9.65	-40.55 248.54	-50 to -30 (endo) 180 to 290 (endo)	9.65	1004.9

 

The test item showed a second distinct endothermic signal in the temperature range of 150 to 310 °C that can be associated with the boiling of the test item.

For the correction of the boiling temperature to standard pressure the test item was assigned to chemical group 2 (eg. Hydrocarbons). A correction value φ = 5.1 was used for the temperature range from 250 °C to 300 °C.

The lowest measured onset temperature is corrected to the standard pressure to be 248.91 °C and the highest onset temperature to be 266.82 °C. As the corrected onset temperatures in both tests deviate by less than 0.5 K from their mean value of 257.87 °C, the test item has a boiling range from 249 °C to 267 °C. No further thermal effects were observed up to the test temperature of 500 °C.

Final Results

The test item has a boiling range of 249 °C to 267 °C at atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry according to Directive EC440/2008 Method A.2., OECD Test Guideline 103 (1995), EPA OCSPP 830.7220 (1998).

 

Conclusions:

A boiling range of 249 to 267 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.2.

Description of key information

Composition A: Boiling range: 249 to 267 °C at 1013 hPa (EU Method A.2, differential scanning calorimetry)

Composition B: Boiling point: 270. 5 °C at 1013 hPa (EU Method A.2, differential scanning calorimetry)

Additional information

A boiling range of 249 to 267 °C (at 1013 hPa) was determined for Composition A according to E.U. Method A.2.

Composotion B has a boiling point of 270.5 °C at atmospheric pressure (1013 hPa) as determined by Differential Scanning Calorimetry and confirmed by the capillary method according to Regulation (EC) No 440/2008 Method A.2. and OECD Test Guideline 103 (1995). The test item starts colourizing at this temperature, which indicates the beginning of decomposition.