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Partition coefficient

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Description of key information

Since the substance is a quaternary alkyltrimethylammonium chloride, it exhibits surface active properties. In such a case, the experimental determination of the partition coefficient Kow is afflicted with errors. Therefore, the Kow will be presented as the comparison between the measured solubilities in both solvents water and n-octanol respectively. In case of water-solubility the value of the critical micelle concentration (cmc) was used as suggested.[1]
n-Octanol solubility: 19.7 g/L (see NOACK study No.: CLF1094141)
water solubility: 10 mg/L (cmc, see CLAS Report No.: 07-29446-2)
log Kow = 3.29
[1]: RIP 3.3 Phase 2 pg. 82 ff

Key value for chemical safety assessment

Log Kow (Log Pow):
3.29
at the temperature of:
20 °C

Additional information

Since the substance is a quaternary alkyltrimethylammonium chloride, it exhibits surface active properties. In such a case, the experimental determination of the partition coefficient Kow is afflicted with errors. Therefore, the Kowwill be presented as the comparison between the measured solubilities in both solvents water and n-octanol respectively. In case of water-solubility the value of the critical micelle concentration (cmc) was used as suggested.[1]

n-Octanol solubility:     19.7 g/L      (see NOACK study No.: CLF1094141)

water solubility:           10 mg/L      (cmc, see CLAS Report No.: 07-29446-2)

log Kow = 3.29

[1]: RIP 3.3 Phase 2 pg. 82 ff

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