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Description of key information

The soil adsorption coefficient normalised for organic carbon content

The organic carbon partition coefficient (Koc) for Diphenyl tolyl phosphate was predicted

using the QSAR calculation of the Estimation Program Interface (EPI) Suite v 4.11. The Koc

was estimated to be 17580 L/kg (logKow method), and 17580 L/ kg (MCI method). The QSAR

proposes to use the formula for polar substances. However it was decided to use the

formula for non-polar substances as the logKow of 4.51 is rather high and the substance

does not contain polar or ionisable groups. The results relate to the unaffected molecule

of the substance as any decomposition (e.g. hydrolysis) of the substance is not taken into

account by the program.

The organic carbon partition coefficient (Koc) for Diphenyl tolyl phosphate was predicted using the QSAR calculation of the Estimation Program Interface (EPI) Suite v 4.11. The Koc was estimated to be 17580 L/kg (logKow method), and 17580 L/ kg (MCI method). The QSAR proposes to use the formula for polar substances. However it was decided to use the formula for non-polar substances as the logKow of 4.51 is rather high and the substance does not contain polar or ionisable groups. The results relate to the unaffected molecule of the substance as any decomposition (e.g. hydrolysis) of the substance is not taken into account by the program.

The organic carbon partition coefficient (Koc) for Diphenyl tolyl phosphate was predicted using the QSAR calculation of the Estimation Program Interface (EPI) Suite v 4.11. The Koc was estimated to be 17580 L/kg (logKow method), and 17580 L/ kg (MCI method). The QSAR proposes to use the formula for polar substances. However it was decided to use the formula for non-polar substances as the logKow of 4.51 is rather high and the substance does not contain polar or ionisable groups. The results relate to the unaffected molecule of the substance as any decomposition (e.g. hydrolysis) of the substance is not taken into account by the program.

Koc) is estimated to be 5560 ml/g (log Koc = 3.745075) using EU-TGD QSAR.

Key value for chemical safety assessment

Koc at 20 °C:
17 580

Additional information

A Koc value of 17580 L/kg is estimated using a QSAR (MCI method)

[LogKoc: 4.245]