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Physical & Chemical properties

Vapour pressure

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Description of key information

Vapour pressure of the substance is derived using read across. According to OECD Guideline 104 vapour pressure of EC 500-029-3 is determined to be 0.0302 Pa 20 °C and that of EC 500-044-5 as 0.00261 Pa at 20°C. The more critical value is used as key value.

Key value for chemical safety assessment

Vapour pressure:
0.03 Pa
at the temperature of:
20 °C

Additional information

In a read across approach studies with both constituent were used to describe the vapour pressure of the substance. The more critical value is used as key value. Hypothesis for the read-across approach: Group: Reaction mass of Glycerol, propoxylated and Sucrose, propoxylated;Succhrose, propoxylated; Propylidynetrimethanol, propoxylated; Glycerol, propoxylated; D‑Glucitol, propoxylated; Propane-1,2-diol, propoxylated; Pentaerythritol, propoxylated; 2,2',2''‑Nitrilotriethanol, propoxylated; Trimethylolpropane, ethoxylated; Diethylene glycol, propoxylated; Ethylene glycol, propoxylated; Diethanolamine, propoxylated. The substance is member of a group of chemicals with similar chemical structure and physical behaviour: 1.) Chemical similarity: All of these substances have terminal OH-groups and ether-linkages as common structural features. Thus, the substances differ from each other only in the identity/type of starter molecule (aliphatic alcohols with 2 to 8 hydroxy functions) used and its associated bonding with the alkoxylate repeating units. Typically the products are substances with a range of Ethyleneoxide or Propyleneoxide units (1 -12.5) added to starter molecules. All substances are characterised by a molecular weight distribution of ca. 150 - 1000. The common function of the members of the group is to allocate a high number of hydroxy functions which are intended to react with e.g. an isocyanate. 2.) Physical behaviour: All members of the group are liquids with elevated viscosity, high solubility in water (> 100 g/L) and a low vapour pressure (<0.0003 hPa).