1-O-β-(2 ,3-di-O-alka(e)noyl-6 -O-acetyl-D-mannopyranosyl)-D-erythritol

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

19 December 2018 to 21 February 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)

Remarks:

Date of Inspection: 21 August 2018 Date of Issue: 19 November 2018

Type of method:

differential scanning calorimetry

Key result

Atm. press.:

100 kPa

Decomposition:

yes

Decomp. temp.:

ca. 350 °C

The thermograms for Determinations 1 to 3 are attached as an Illustration.

After heating to 400°C, the samples had lost approximately 78% and 77% of their original weight for Determinations 1 and 2 respectively.

It was not possible to definitively determine when the test item either boiled or decomposed. Based on the significant amount of residue remaining, even up to 400 °C, it indicated that the test item did not boil even though some components and/or decomposition products volatilised. The thermograms didn't show a clear event for when the test item decomposed but the "noisy" trace as it approached 400 °C suggested decomposition was occuring.

Several investigative runs were performed to observe their residue after being heated. Up to 300 °C the residue was just colourless to pale yellow in colour; not significantly different from the test item in small quantities. Being heated to 350 °C the residue had taken on a slightly more yellow colouration, but significantly less than at 400 °C when it became a distinctive dark brown. This clearly indicated decomposition occured between 350 °C and 400 °C.

As a result of the low rate of enthalpy change during initial decomposition, the result could only be approximated. The test item may decompose or internally react at below 350 °C but not significantly based on the thermograms and residue appearances.

Conclusions:

The test item has been determined to decompose from approximately 350 °C (623 K) at 100 kPa. As the test item decomposed, no value for boiling temperature could be detemined.

Executive summary:

The boiling point of the test item was investigated by differential scanning calorimetry, designed to be compatible with Method A.2 Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 103 of the OECD Guidelines for the Testing of Chemicals, 27 July 1995. The test item was determined to decompose from approximately 350 °C (623 K) at 100 kPa. As the test item decomposed, no value for boiling point could be determined.

Description of key information

Decomposition from approximately 350 °C; OECD 103; Fox, J. M. (2019)

Additional information

As the test item decomposed, no value for boiling temperature could be detemined.