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Diss Factsheets

Physical & Chemical properties

Boiling point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009-09-04 to 2009-12-07
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Version / remarks:
27 July 1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
- Name of test material (as cited in study report): DD Lactide
- Batch no: 0809002497
- Purity 100 %
- Appearance: white flakes
- Expiration date of the lot/batch: 2009-11-02
- Stability under storage conditions: stable
- test substance storage: at room temperature in the dark
Key result
Boiling pt.:
268 °C
Atm. press.:
1 021 hPa
Remarks on result:
other: Some polymerization occurred during boiling.
Conclusions:
In conclusion, it can be stated that the boiling point of DD lactide is 268 °C at atmospheric pressure.
Executive summary:

The boiling temperature of the test substance was determined using differential scanning calorimetry (DSC) in an experimental study conducted according to OECD TG 103.This technique records the difference in heat flow to two crucibles, one filled with test substance and the other filled with an inert reference material, while these crucibles are subjected to a controlled temperature programme. When the test substance undergoes a transition, such as melting or evaporation, it is indicated by a deviation from the base line of the heat-flow record. Because melting and evaporation are processes in which heat is consumed, for these processes the deviation from the base line is in the endothermic direction. The boiling temperature (if any) of the test substance is evaluated from the DSC curve as the extrapolated onset temperature of the endothermic melting or evaporation peak. The boiling temperature of the test substance calculated as the mean value of experiments 1 and 2 is 268 °C at atmospheric pressure.

Description of key information

It can be stated that the boiling point of DD Lactide is 268 °C at atmospheric pressure based on the results from an experimental study conducted according to OECD TG 103.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
268 °C

Additional information