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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:
2012-05-29
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Version / remarks:
, 1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
, 2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Atm. press.:
1 013 mBar
Decomposition:
yes
Decomp. temp.:
320 °C
Remarks on result:
other: only atmospheric pressure was stated, 1013mbar were assumed

In the thermograms of the DSC runs in open crucibles an endothermic effect was detected in the temperature range of 90 – 180 °C and exothermic effects were observed in the temperature range of 230 – 380 °C. The latter are most likely due to a reaction of the sample with air (oxygen) as these effects were not observed in tests with closed crucibles under nitrogen

No

Sample weight / mg

Onset of Effect / °C

Range of effect / °C

Weight loss / mg

1

12.93

132
230
330

90 - 190
230 - 320
330 - 380

7.57

12.33  137
220
 
 90 - 190
220 - 370

7.01

 

The following effects were noted in two DSC-measurements in glass crucibles with oxygen:

1.   Endothermic effect due to evaporation of H2O in the temperature range up to 190 °C.

2.   Exothermic effect due to thermal decomposition in the temperature range of 220 ‑ 320 °C.

3.   Exothermic effect due to thermal decomposition in the temperature range of 320 ‑ 380 °C.

Conclusions:
Vanadium, oxalate complexes decomposes at 320 °C.

Description of key information

Vanadium, oxalate complexes decomposes at 320 °C.

Key value for chemical safety assessment

Additional information