Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

The physico-chemical properties of this UVCB substance have been measured according to accepted methods, and data from the component substance (glycerol) are used to support information requirements for vapor pressure and octanol-water partition where measurements for the UVCB mixture are problematic.

This substance occurs as a viscous, dark brown liquid at ambient temperature (25 °C) and remains in liquid state at temperatures as low as -90 °C. At standard atmospheric pressure, the substance boils at a temperature of 250.17 °C. As the vapor pressure is dominated by the presence of 4.98% water in the representative sample, boiling point of a water-free substance is likely to be much higher. The vapor pressure of a water-free sample is expected to be less than or equal to that of glycerine (the primary component), which is 0.0223 Pa at 25 °C. The bulk liquid substance has a density of 1.13 g/cm3 at 20 °C, and thus would tend to sink in water before becoming fully dissolved. The water solubility was measured to be > 1,000 g/L, and as such, the substance is described as being miscible with water in all proportions. The surface tension of an 0.1% wt. aqueous solution (68.7 mN/m at 20 °C is only slightly less than that of pure water, and thus not indicative of surface-active properties. The substance exhibits a flash point of 136 °C, but is regarded as not flammable upon contact with water, and not explosive or oxidizing upon contact with water or other organic materials. The major components of this UVCB substance do not possess functional groups or atoms which may be ionized in aqueous solutions at physiologically- or environmentally-relevant pH. The dynamic viscosity of the substance is measured to be 5,651 mPa*sec at 20 °C. This combination of high surface tension and high viscosity indicates the substance to be of low concern for aspiration hazard.