Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

The anhydrous form of the HEBMP-H is a solid under ambient conditions, however, the commercial samples as supplied in Europe are typically manufactured in situ as an aqueous solutions (liquid). Thus, the substance is not marketed or used in the solid state.

HEBMP-H melts with decomposition from 129°C.

Based on the REACH Regulation (EC n. 1907/2006), annex VII, column 2, the study of boiling point does not need to be conducted for solids which either melt above 300 °C or decompose before boiling.

As weight of evidence from data of different companies the specific gravity values of HEBMP-H is in the range 1.26 - 1.39 g/cm³ at ambient conditions for various commercial solutions.

The particle size distribution is not relevant to substances not used or marketed in a non-solid form as HEBMP-H.

The vapour pressure of the substance is obtained as read-across with its sodium salt(Vapour pressure HEBMP-xNa: <0.0038 Pa at 25 °C).

The estimated partition coefficients  using QSAR are -4 for linear form of HEBMP-H and -3.4 for cyclic form of HEBMP-H.

The HEBMP-H is very soluble in water (approximately 750 g/l at 20°C data obtained as read-across with its sodium salt HEBMP-xNa).

No surface activity is expected for HEBMP-H.

HEBMP-H is not autoflammable till 400°C (data obtained as read-across with its sodium salt HEBMP-xNa).

The flash point and flammability are waived because the commercial substances are only available as aqueous solutions.

HEBMP-H is not explosive and it is not oxidising based on its chemical structure.

The stability of HEBMP-H in organic solvent is waived based on no critical issue regarding the stability of the substance. In fact, The HEBMP-H is stable till 200°C.

 pH of HEBMP-H is less than 2 (data obtained as weight of evidence from different source).

Regarding dissociation constant HEBMP-H has four ionisable protons for linear form and three for cyclic form.

The Viscosity is a property that is measured for fluids only. Even though there is no adaptation rules in the REACH Regulation (EC. n.1907/2006) Column 2 of Annex IX, measure of viscosity is waived for solids or aqueous solution.