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Physical & Chemical properties

Partition coefficient

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Description of key information

A representative limit Log Pow value of 4.5 is considered appropriate for Molyvan 855. 
Harlan Laboratories, Ltd. (2011) was chosen as the key study due to being conducted according to OECD GLP guidelines with detailed analytical investigations. Safepharm Laboratories, Ltd. (1998) is a supporting study due lack of analytical determination.

Key value for chemical safety assessment

Log Kow (Log Pow):
4.5

Additional information

Key study

The key study conducted in accordance with Method A8 Partition Coefficient of Commission Regulation (EC) No 440/2008 of 30 May 2008 under GLPreported a Log Pow range of <0.3 to 6.5. Approximately 51.6% of the quantitated test item constituents had a Log Pow of <3.0 (using area normalization), and 64.8% had a Log Pow of <4.5 (using area normalization). Based upon the results of the key hydrolysis data, the registered substance will quickly be hydrolysed. A representative limit Log Pow value of 4.5 is therefore considered appropriate for Molyvan 855. (Harlan Laboratories, Ltd, 2011

 

Supporting study

In a study conducted in accordance with Method A8 Partition Coefficient of Commission Regulation (EC) No 440/2008 of 30 May 2008 and in a GLP laboratory, the partition coefficient was estimated, based on the solubility in n-octanol and water, to be greater than 2.80x10^4, log10 Pow >4.45. This result is of limited value as analysis was by visual inspection, which given the complex reaction mixture nature of the substance is intrinsically of limited reliability. (SafePharm Laboratories, Ltd. 1998).

 

Supporting study

As only limit values could be obtained experimentally for the majority of the substance constituents, the partition coefficient wasestimated for the proposed dominant test item constituents using KOWWIN™, version 1.68, September 2010, © 2000 U.S. EPA, for the purpose of estimating an adsorption coefficient. The resulting estimations of partition coefficient (Log Pow) range from 4.8 to 6.6. Less abundant, higher chain length reaction products, as well as products containing multiple coconut oil alkyl residue groups, however, would potentially present even higher partition coefficient values.