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Environmental fate & pathways

Henry's Law constant

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Description of key information

The Henry’s law constant for mono-, and di-(sec-hexadecyl)naphthalene has been calculated to be ca. 0.0104 atm-m3/mole using the US EPA EPI-Suite model.   This indicates that volatilization from water, if it occurs, is relatively slow.  Similarly, volatilization from air and from air are expected to be slow and limited.  

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Additional information

The study substance, mono-, and di-(sec-hexadecyl)naphthalene, is expected to have a vapor pressure that is relatively low (<0.00034 Pa at 25 °C) which indicates limited volatilization from the terrestrial compartment. The Henry’s law constant for mono-, and di-(sec-hexadecyl)naphthalene has been calculated to be ca. 0.0104 atm-m3/mole and indicate that volatilization from water, if it occurs, is relatively slow. Hence, mono-, and di-(sec-hexadecyl)naphthalene most likely volatilize slowly to air from aqueous environments and probably have limited volatilization from soil.

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