1,4-dioxan-2-one

Boiling point

Administrative data

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

8 January 2018 - 29 November 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2019

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7220 (Boiling Point / Boiling Range)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Test material

Test material information

Constituent 1

Reference substance name:

1,4-dioxan-2-one

EC Number:

608-477-2

Cas Number:

3041-16-5

Molecular formula:

C4H6O3

IUPAC Name:

1,4-dioxan-2-one

Test material form:

solid

Details on test material:

- Physical state: powder/solid
- Appearance: white powder

Specific details on test material used for the study:

- Batch n°: 397451
- Expiration date: 07 July 2018
- Purity: 99.86 %
- Storage condition of test material: In refrigerator (2-8°C)

Results and discussion

Boiling point

Key result

Boiling pt.:

219.9 °C

Atm. press.:

1 013.25 hPa

Decomposition:

no

Any other information on results incl. tables

The first experiment to investigate the boiling temperature showed an extrapolated onset temperature of the melting peak at 28.061°C. An endothermic peak was observed between 50°C and 125°C. The endothermic effect was most likely obtained due to evaporation of moisture. Another endothermic peak was observed between 150°C and 250°C and the extrapolated onset temperature was 219.934°C. After the experiment it was observed that the test item had evaporated from the sample container. The second endothermic effect was most likely obtained due to boiling of the test item.

In order to investigate the boiling peak, a higher heating rate of 50°C/minute was used in the second experiment. The extrapolated onset temperature of the melting peak was 28.919°C. The extrapolated onset temperature of the boiling peak was 220.149°C. The endothermic peak had not shifted to significantly higher temperatures. It demonstrated that boiling of the test item caused the endothermic effect. Since a higher heating rate was applied, the extrapolated onsets were not used for calculation of the melting and boiling temperature of the test item. After the experiment it was observed that the test item had evaporated from the sample container.

The last experiment (performed as duplicate determination of the boiling point) showed similar results as the first experiment. The extrapolated onset of the melting peak was 28.026°C. The extrapolated onset of the boiling peak was 219.909°C. After the experiment it was observed that the test item had evaporated from the sample container.

The boiling temperature was determined as the mean boiling temperature of the first and third experiment and equals 219.9°C (493.1K).

Applicant's summary and conclusion

Conclusions:

The boiling temperature is determined to be 219.9°C (493.1K). The atmospheric pressure was 1023 ± 2 hPa.