Savory, Satureja hortensis, ext.

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

28 March to 09 April 2019

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, and under GLP. The test substance is adequately characterised. Therefore full validation applies.

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point/Boiling Range)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

method according to Siwoloboff

Specific details on test material used for the study:

EssentÍal oil of Summer Savory/batch No. SSVI.ES.sample
Date of manufacture: 08.01.2019
Expration date of the batch: 08.01.2021
UVCB substance;
Purity test date: 18.01.2019

Key result

Boiling pt.:

115 °C

Atm. press.:

1 013.3 hPa

Decomposition:

yes

Decomp. temp.:

115 °C

The Observations and the measured values are presented in the following tables.

Table: Boiling point (DSC measurements)

Test item/mg	Starting temperature/°C	Final test temperature/°C	Temperature range (endothermal)/°C	Onset (boiling)/°C	Crucible	Observations after the measurement
14.28	25 -80	-80 500	115-250	multistage	Aluminium with a hole	Mass loss 100 %
12.38	25	300	150-265	multistage	Aluminium with a hole	Mass loss 100 %

Table: Boiling point (results of the capillary method)

No	Set point/°C	Heating rate/K/min	Endpoint/°C	Remarks
1	100	10	300	Approx. 115 °C: starting formation of bubbles Approx. 195 °C: increasing formation of bubbles Approx. 209 °C: test item boiled Approx. 260 °C: decreasing formation of bubbles Approx. 278 °C: formation of white steam/smoke and increasing formation of bubbles Afterwards: test item discoloured to a darker shade

Conclusions:

The initial boiling temperature of the test item has been determined to be 115 °C, at atmospheric pressure (1013.3 hPa).

Executive summary:

The initial boiling point of the test item was measured under GLP according to OECD 103 / EU A2 guideline, by two DSC measurements in aluminium crucibles with a hole showed a multistage endothermal effect in the temperature range of 115-265 °C. A measurement with the capillary method was performed to clarify the results of the DSC measurements. Since this measurement was performed only as a verifying screening a high heating rate of 10 K/min was chosen. Under consideration of the results from the DSC measurements and the capillary method it was concluded that the test item boiled under decomposition starting at approximately 115 °C.

Description of key information

The test item had boiled at atmospheric pressure (1013.3 hPa) under decomposition starting at 115°C.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

115 °C

Additional information

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

Two DSC measurements in aluminium crucibles with a hole showed a multistage endothermal effect in the temperature range of 115-265 °C. No further endothermic or exothermic effects were observed up to the final temperature (500 °C). The mass loss after the DSC measurements amounted to 100 %. A measurement with the capillary method was performed to clarify the results of the DSC measurements. Since this measurement was performed only as a verifying screening a high heating rate of 10 K/min was chosen and therefore the absolute temperature values derived with the capillary method are not as accurate as the DSC results. The filling height of the test item was approximately 5 mm. Under consideration of the results from the DSC measurements and the capillary method it was concluded that the test item boiled under decomposition starting at approximately 115 °C.