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Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

September 01-05, 2022

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

The study has been conducted according to internationally recognised guideline, under GLP. No deviation from guideline are reported. The substance is adequately identified. Therefore full validation applies.

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Version / remarks:

2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Version / remarks:

1995

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

GLP-BESCHEININGUNG Statement of GLP Compliance (inspected on 28-29 April 2021, signed on 21 June 2021)

Type of method:

differential scanning calorimetry

Boiling pt.:

>= 80.04 - <= 88.74 °C

Atm. press.:

>= 1 004.9 - <= 1 005 mBar

Decomposition:

yes

Decomp. temp.:

>= 352.04 °C

Remarks on result:

other: range (min - max) of the onset endothermic events.

Main Test

Three DSC measurements were carried out.

All the results are reported in the following Table 1 - Results:

Table 1 - Results

Boiling point	in °C (onset)	in K
1 Determination	83.59	356.74
2 Determination	88.74	361.89
3 Determination	80.04	353.19
Min	80.04	353.19
Max	88.74	361.89
Peak max	in °C	in K
1 Determination	105.74	378.89
2 Determination	106.95	380.10
3 Determination	105.11	378.26
Min	105.11	378.26
Max	106.95	380.10
Decomposition	in °C (onset)	in K
1 Determination	not completely detected
2 Determination	354.34	627.49
3 Determination	352.04	625.19
Min	352.04	625.19
Max	354.34	627.49

As the test item is a UVCB substance a boiling range can be expected. Therefore, a boiling range is stated for the test item COFFEE CONCRETE:

- The endothermic event ranged in a range of onset from 80.04 °C to 88.74 °C (353.19 K to 361.89 K).

- The peak maximum ranged from 105.11 °C to 106.95 °C (378.26 K to 380.10 K).

- The decomposition was observed at the beginning of the  onset temperature of 352.04 °C (625.19 K)

The atmospheric pressure was recorded in a range of 1004.9 – 1005.0 mbar.

No observations were made which might cause doubts on the validity of the study outcome.
Therefore, the result of the study is considered valid.

 

 

Conclusions:

The onset of boiling was observed in the range from 80.04 °C to 88.74 °C (353.19 K to 361.89 K).
Decomposition was observed at the beginning of the onset temperature of 352.04 °C (625.19 K). The atmospheric pressure was recorded in a range of 1004.9 – 1005.0 mbar.

Executive summary:

The boiling point of the test substance was determined under GLP according to OECD 103 / EU A2 guideline, using the DSC method.

Three main runs were performed, under inert atmosphere.

As the test item is a UVCB substance a boiling range can be expected. Therefore, a boiling range was stated for the test substance:

- The onset of boiling was observed in the range from 80.04 °C to 88.74 °C (353.19 K to 361.89 K).

Decomposition was observed at the beginning of the onset temperature of 352.04 °C (625.19 K).

The atmospheric pressure was recorded in a range of 1004.9 – 1005.0 mbar.

Description of key information

The onset of boiling was observed in the range from 80.04 °C to 88.74 °C (353.19 K to 361.89 K).
Beginning of the onset decomposition temperature: 352.04 °C (625.19 K).

The atmospheric pressure was recorded in a range of 1004.9 – 1005.0 mbar.

Additional information

A fully reliable experimental study, conducted according to a recognised EC method and under GLP, is available. It is considered as a key study.