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Physical & Chemical properties

Partition coefficient

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Description of key information

log Pow  of Sodium methylparaben: -0.63 (at 20°C, pH 10)
log Pow of Methylparaben (corresponding acid at neutral pH) = 1.98 (at 20°C, pH 7.5)

Key value for chemical safety assessment

Log Kow (Log Pow):
-0.63
at the temperature of:
20 °C

Additional information

The partition coefficient n-octanol/water of Sodium methylparaben was determined by the shake flask method in a study according to OECD Guideline No. 107 to be log P(OW) = -0.63.

The partition coefficient n-octanol/water of Methylparaben (the corresponding acid at neutral pH) was determined by the shake flask method similar to OECD Guideline No. 107 to be P(OW) = 95.5 equivalent to log P(OW) = 1.98.