Reaction mass of [[(2-hydroxyethyl)imino]bis(methylene)]bisphosphonic acid and Phosphonic acid, P-[(tetrahydro-2-hydroxy-2-oxido-4H-1,4,2-oxazaphosphorin-4-yl)methyl]-

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is a solid which decomposes before boiling

Description of key information

Boiling point: HEBMP-H will undergo thermal decomposition without boiling.

Additional information

The requirement to conduct a boiling point study for HEBMP-H was waived because the substance is expected to undergo thermal decomposition without boiling. This statement is supported by the evidence from the read-across DSC study which demonstrated that the sodium salt, HEBMP-xNa melts with decomposition without boiling from 129°C at 1013 hPa. The parent acid would also be expected to undergo thermal decomposition.

In secondary sources to which reliability could not be assigned, boiling point values of >100°C and 105°C with a decomposition temperature of >200°C after evaporation of water were reported for aqueous solutions of HEBMP-H.