(Z)-tetrahydro-6-(2-pentenyl)-2H-pyran-2-one

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

18 March 2019 - 02 May 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

ca. 292.2 °C

Atm. press.:

102.4 kPa

From comparison of the endotherm profiles obtained from samples analyzed using perforated crucible lids (which allow self-pressurization up to the boiling point) and those using manually pierced crucible lids (i.e. an open system), it can be confirmed that the observed thermal event was a true boiling point for the test item. This was since the open system allowed premature evaporation of the test item during heating, resulting in a broader endotherm, with a typically lower and more variable extrapolated onset temperature. 

The pre‑perforated crucible lids however, which contain a consistent 50 µm perforation achieved by laser drilling, retained the initial vapor within the crucible, until the exponential increase in pressure as the boiling point was reached. It is for this reason that only the results obtained from the perforated crucible lid determinations, runs 1 and 2, were used for the quantification of the boiling point. 

The use of manually pierced crucibles (an open system)alsoprovided an opportunity to assess the stability of the test item in air and in an inert atmosphere (nitrogen). In both cases the test item vaporized (boiled) completely withlittle or no residues remaining. Differences between the thermogram profiles in the two atmospheres may have originated from variability in the size of the manually pierced holes and the change from a static air atmosphere, to a flowing nitrogen atmosphere, both of which would influence the onset and rate of vaporization of the test item.

Conclusions:

The boiling point of the test item has been determined to be 292.2 ± 0.5 °C (565.4 ± 0.5 K) at 102.4 kPa.

Description of key information

The boiling point of the test item has been determined to be 292.2 ± 0.5 °C (565.4± 0.5 K) at102.4kPa.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

292.2 °C

Additional information

The determination of boiling point of Jasminlactone was carried out by differential scanning calorimetry. The procedure was designed to be compatible with the EC Method A.2 and the OECD test guideline 103, and was conducted in compliance with GLP.

 

The boiling point of the test item has been determined to be 292.2 ± 0.5 °C (565.4 ± 0.5 K) at 102.4 kPa.