Registration Dossier

Physical & Chemical properties

Partition coefficient

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The log partition coefficients for the rosin ester substances range from 2.44 - >6.5.

The log partition coefficient of Resin acids and rosin acids, esters with glycerol is 3.97 at 20 - 25°C and pH 6.1 - 6.6.

Key value for chemical safety assessment

Additional information

A study following the EU method A.8 (shake-flask method) was used as the key study (Chilworth Technology, 2010a). The following partition coefficient result was obtained: Log P = 3.97 at 20°C and pH 6.1 – 6.6.

An additional supporting study is available for Resin acids and rosin acids, esters with glycerol, conducted according to OECD 117 HPLC method (Water Quality Institute, 1993a). This study showed no detectable peak corresponding to log Kow > 1.5, whether at pH2 or pH 7.5. It should be noted that the substance has extremely low water solubility (< LOQ of 0.43 mg/L); therefore, it will tend to be "pushed out" of the water phase.