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Physical & Chemical properties

Water solubility

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Description of key information

The water solubility of the test item was determined using the SPARC (v6.0), ALOGPS, WSKOWWIN (v1.42) and WATERNT (v1.01) QSAR models and the average of the geometric mean water solubilities of the constituents was 3.91 x10 -06 mg/L.

Key value for chemical safety assessment

Water solubility:
0 mg/L
at the temperature of:
25 °C

Additional information

Polyurea greases thickeners are not synthesized as “pure” compounds and do not exist except in the presence of base oil grease matrix. High temperature stability indicates that the structures of PU substances are robust and resistant to diffusion out of the grease matrix. Therefore, dissolution of PU substances from grease into water is very unlikely as the thickeners are poorly water soluble and are embedded in the hydrophobic grease matrix. PU substances are expected to reside within the grease base oil matrix and are not expected to favourably partition to water. Additionally, due to the low water solubilities of these substances, below the limit of detection (LoD) or Limit of Quantification (LoQ) for standard methods, the water solubility was predicted by QSAR modelling.