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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
October 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
The determination of the melting point of EDTA-CoNa2 is technically not feasible as the test item decomposes before melting.
By replacing the sodium moiety of EDTA-CoNa2 by hydrogen the stability will not change significantly, so the determination will not be possible neither.
Reason / purpose:
read-across source
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
<= 178.47 °C
Conclusions:
The determination of the melting point of EDTA-CoNa2 is technically not feasible as the test item decomposes before melting.
The beginning of decomposition is state as 178.47 °C (451.62 K).
By replacing the sodium moiety of EDTA-CoNa2 by hydrogen the stability will not change significantly. Based on that it can be concluded that EDTA-CoH2 will not melt but decompose as well at or below 178.47 °C

Description of key information

Key value for chemical safety assessment

Additional information

The determination of the melting point of EDTA-CoNa2 is technically not feasible as the test item decomposes before melting.

The beginning of decomposition is state as 178.47 °C (451.62 K).

By replacing the sodium moiety of EDTA-CoNa2 by hydrogen the stability will not change significantly. Based on that it can be concluded that EDTA-CoH2 will not melt but decompose as well at or below 178.47 °C