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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:
2017-09-07 to 2018-01-11
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
Related information:
Composition 1
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
2008
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
signed 2013-03-22
Type of method:
differential scanning calorimetry
Test material information:
Composition 1
Specific details on test material used for the study:
Storage conditions: Store only in the origin containment, keep containment tightly closed at a well-ventilated place
Atm. press.:
1 003.3 hPa
Decomposition:
yes
Decomp. temp.:
ca. 400 °C
Remarks on result:
other: no boiling point up to 500 °C

Boiling Point (DSC)

In the temperature range of 160 °C – 240 °C, an endothermic effect was observed. In the temperature range 400 – 470 °C an exothermal decomposition with an average energy of -400 J/g was observed.

Results of the DSC-measurements

No.

Sample weight [mg]

Onset of Effect [°C]

Range of effect [°C]

Weight loss [mg]

Atmospheric pressure / hPa

PN14201

10.00

179.76

160 – 240 (endo)

400 – 470 (exo)

9.66

1003.6

PN14202

11.21

181.22

170 – 240 (endo)

420 – 470 (exo)

9.93

1003.0

Measurements by the Capillary Method

To verify the results of the DSC measurement, an additional measurement with the capillary method (Apparatus: Stuart Melting Point SMP 30) was performed in the temperature range of 50 °C – 400 °C with a heating rate of 10 K/min. No melting, boiling or change of the colour or of the physical state of the test item was observed during the measurement with the capillary method. According to the observations during the tests with the capillary method, the endothermic effect starting at 160 °C in the DSC measurements with open crucibles cannot be assigned to the melting of the test item.

Due to the fact that an exothermic effect was observed in the DSC measurements starting at a temperature of approx. 400 °C with a significant loss of weight, it can be stated that the test item has no melting point and no boiling point up to its decomposition.

Conclusions:
The test item zinc 5-nitroisophthalate has no boiling point at atmospheric pressure (10013.3 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 zinc 5-nitroisophthalate has no boiling point at atmospheric pressure (10013.3 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