Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

CAS 28950-61-0 is an organic green yellow powder at 20 °C and 1013 hPa; it is a member of the Stilbene Fluorescent Whitening Agent (SFWA) category, group 2.

Neither boiling, nor melting point were detected using the DSC method of analysis up to 350 °C.

Particle size distribution showed that the substance is characterized by a MMD of 128 µm.

The partition coefficient n-octanol/water was estimated from the individual solubilities of the test item in water and n-octanol and resulted as log Kow:- 3.392 at 20 °C.

It is very soluble in water (380 g/l). Under environmental conditions the substance dissociates completely in water.

Since the substance is solid, properties as vapour pressure, surface tension, flash point can be disregarded, while viscosity determination is technically not feasible.

It does not ignite and propagate combustion; the screening evaluation failed to evidence any reason of concern, on the basis of the chemical structure analysis and the thermal behaviour investigation.

It does not meet the criteria to be considered as flammable/explosive/oxidising.