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Description of key information

The Henry´s Law Constant H is estimated as 4.47 Pa*m³/mol at ambient temperature, related to the vapour pressure and water solubility of the substance oligomerisation and alkylation reaction products of 2-phenylpropene and phenol [EC no. 700-960-7].

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
3.28
at the temperature of:
21 °C

Additional information

The value derived for Henry's Law constant H relates to the properties of the substance oligomerisation and alkylation reaction products of 2-phenylpropene and phenol [EC no. 700-960-7]. Vapour pressure (VP) and water solubility (WS) were obtained from tests with different samples of the substance (see CSR Chapter 1.3). The molecular weight was determined as average molecular weight of the different commercial products of the substance taking into account the percentage of the components in the products and their respective molecular weights. The 90th percentile of these data was taken as characteristic average molecular weight for the substance (average MW 298 g/mol).

The constant H for the substance 'oligomerisation and reaction product …' is calculated using the vapour pressure of 0.044 Pa and the water solubility of 4 mg C/L (= 0.0134 mol/m³), both at 21°C (see Chapter 1.3.). Dimension of H is Pa*m³/mol.

H = VP / WS x MW = 0.044 Pa / 4 mg/L x 298 g/mol = 3.278 Pa*m³/mol