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Environmental fate & pathways

Henry's Law constant

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Description of key information

From the water surface the substance will not evaporate into the atmosphere. 

Key value for chemical safety assessment

Additional information

The Henry's law constant of DL-alpha-Tocopherol (CAS 10191-41-0) at 25 °C was estimated to be 0.36 Pa*m³/mol using the bond estimation method of HENRYWIN v3.20 implemented in EPISUITE v.4.11. The substance was not within the estimation domain of the model since the maximum number of occurrence of three bonds was exceeded by the substance. Therefore, the estimate may be less accurate. However, as the bond estimation method is regarded to be a reliable estimation method, the result is used in the assessment of DL-Alpha-Tocopherol (CAS 10191-41-0). The HENRYWIN estimate refers to the uncharged molecule. The estimated HLC value indicates that the substance will not evaporate into the atmosphere.