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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
27 May 2010-15 July 2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
This study has been performed according to OECD and EC guidelines and according to GLP principles. Test substance is adequately characterised. Validation applies, with restrictions on accuracy, due to heating rate and thermal profile.
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
other: Differential Scanning Calorimetry + ThermoGravimetric Analysis
Boiling pt.:
75 - 175 °C
Atm. press.:
1 010 hPa

Preliminary test

From 120°C upwards the weight of the sample decreased significantly. At 135°C the sample weight had decreased by 25%.

 

After the experiment, a grey powder remained in the sample container.

 

Main Study

During initial experiments aluminium sample pans were used. During these experiments exothermic effects were observed which are assigned to reaction of the test substance with the aluminium sample pan. Therefore golden pans were used in order to determine the melting and boiling point of the test substance.

 

In the first experiment, during heating, an endothermic peak was observed between 75°C and 175°C. The extrapolated onset of the endothermic peak was determined to be 113.25°C. The origin of the peak was assessed to the evaporation. Between 175°C and 250°C an endothermic peak was observed from which the origin is unknown. After the experiment, a white solid remained in the sample container.

 

With the second experiment, essentially the same results as during the first experiment were obtained. The extrapolated onset temperature of the evaporation peak was determined to be 114.19°C. After the experiment, a white solid remained in the sample container.

 

The evaporation peak between 75°C and 170°C was assigned to boiling of water present in the test substance.

Conclusions:
The boiling range was attributed to evaporation of water.
Executive summary:

The boiling point of aluminium chloride basic (as aqueous solution) was investigated according to OECD/EC guidelines, DSC method. Two assays were performed under nitrogen. Boiling was observed in the range 75 to 175°C.

Description of key information

Boiling range: 75 - 175°C  (aqueous solution as manufactured), attributed to evaporation of water.

Key value for chemical safety assessment

Additional information

A reliable experimental study, conducted according to a recognized OECD/EC method and under GLP, is available. Therefore, it is considered as a key study. As a range was observed, the result cannot be retained as key data for purpose of CSA.

As an UVCB, it should be noted that the value of the parameter may show some variations.