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Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Apperance: Solid white crystalline material

The melting point of the substance is 172°C

The substance decomposes before boiling

Relative density at 20ºC: 1.407 ± 0.003

The particle size distribution (Granulometrie) study does not need to be performed as the substance is produced, marketed and used in a non solid or granular form.

Vapour pressure at 20°C 3.52*10-7 Pa

The partition coeficient logPow at 22 ± 1ºC: -0.42 ± 0.39 (This does not fall within a range of ± 0.3 as prescribed by the guideline)

Water solubility at 20ºC > 1000 g/l for all three buffer solutions.

The surface tension at 20ºC is 71.3 ± 3.2

The substance is a solid and therefore no flash point has been determined

No indication of self-ignition

Not highly flammable

The substance is not exploding

The substance is not oxidising

The stability in organic solvents does not need to be tested because it is not considered as critical

pH of a 50 % w/w solution of EP1-Na is 13.7

The dissociation constant pKa at 19.4ºC is 8.86 ± 0.026 (The sample tested contains different impurities and also NaOH as a stabilizer)

Viscosity is a relevant property only for liquids