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Physical & Chemical properties

Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
To be completed
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
2008
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
- Test item: REACH substance = freeze-dried commercial product
- Analytical purity: 97.2%
- Purity test date: 08 March 2017
- Lot:bacth No.: WI6G16X07 after drying
- Expiration date of the lot/batch: 16 July 2018
- Appearance: Off-white to yellow crystals
- Storage: At room temperature
Key result
Decomposition:
yes
Remarks on result:
not determinable

Preliminary test

Starting at 225°C, the weight of the sample decreased significantly. At 346°C, the sample weight had decreased by 25%. After the experiment, a black molten residue remained in the sample container (original colour: off-white to yellow). The change of the colour indicated reaction and/or decomposition of the test item.

Main study

In Experiment 1, an endothermic peak was observed between 25°C and 100°C. The endothermic effect was due to evaporation of volatile components (the test item contains 2.8% water). An endothermic peak was observed between 100°C and 200°C. The extrapolated onset temperature of the peak was 137.708°C. The endothermic effect was most likely obtained due to melting and reaction and/or decomposition of the test item. From 200°C, an endothermic peak followed by an exothermic peak were observed. The effects were due to reaction and/or decomposition of the test item. After the experiment, a brown molten residue remained in the sample container.

Additional experiments (Experiment 2 to Experiment 4) were performed to investigate further the melting peak and confirmed that reaction and/or decomposition occurred during melting of the test item.

Conclusions:
The test item had no measurable boiling temperature since boiling of the test item was not observed below the temperature at which reaction and/or decomposition started.
Executive summary:

The boiling point of the test item (= REACH substance) was investigated in a GLP-compliant study performed in accordance with EC A.2 method and OECD Guideline No. 103, using Differential Scanning Calorimetry (DSC). The test item had no measurable boiling temperature since boiling of the test item was not observed below the temperature at which reaction and/or decomposition started.

Description of key information

The boiling point of the test item (= REACH substance) was investigated in a GLP-compliant study performed in accordance with EC A.2 method and OECD Guideline No. 103, using Differential Scanning Calorimetry (DSC). The test item had no measurable boiling temperature since boiling of the test item was not observed below the temperature at which reaction and/or decomposition started.

Key value for chemical safety assessment

Additional information

The boiling point of the test item was investigated in one GLP-compliant study performed in accordance with standard methods, without deviations. The study is considered as reliable (Klimisch 1) and is selected as a key study for the endpoint.