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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:
2018-04-19
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)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
signed 2017-02-28
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
Storage conditions: Ambient temperature, dry, tightly closed in original container
Boiling pt.:
> 500 °C
Atm. press.:
1 016 hPa
Decomposition:
no
Remarks on result:
other: No boiling point up to 500 °C

Results

In the temperature range of 140 °C – 290 °C an endothermic effect (melting) was observed. No further thermic effects could be observed up to the maximum measured temperature of 500 °C.

Results of the DSC-measurements

 No. Sample weight [mg] Onset of Effect [°C]

Range of effect [°C]

Weight loss [mg]

Atmospheric pressure [hPa]

PN15513

10.99

 176.40       

 140 – 270 (endo)      

7.22

1016.0

PN15514

11.95

 174.53       

 150 – 290 (endo)       

7.75

1016.0

During the heating phase a distinct endothermic effect was observed in the temperature range of 140 – 290 °C, which can be assigned to the melting of the test item. As the onset temperatures in both tests do deviate by more than 0.5 K from their mean value of 175.47 °C, the test item has a melting range of 174 – 176 °C.

Since no further endothermic effects could be observed up to the maximum measured temperature of 500 °C, it can be stated that the test item has no boiling point up to its temperature.

Conclusions:
The test item di-Ammonium hydrogen citrate has no boiling point up to a temperature of 500 °C at atmospheric pressure (1016 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.2. and OECD Test Guideline 103 (1995).

Description of key information

The test item di-Ammonium hydrogen citrate has no boiling point up to a temperature of 500 °C at atmospheric pressure (1016 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.2. and OECD Test Guideline 103 (1995).

Key value for chemical safety assessment

Additional information