Measurements of the Henry's law coefficients of 2-methyl-3-buten-2-ol, methacrolein, and methylvinyl ketone

Using an equilibrium headspace technique, Henry's law coefficients were measured for methacrolein (H = 6.5 ± 0.7 M atm^-1) and methylvinyl ketone (41 ± 7.0 M atm^-1) in water at 25°C. In addition, 2-methyl-3-buten-2-ol was studied at 30°C in water and in an aqueous ionic solution representative of plant tissue. Similar values were found in deionized water (65 ± 3.5 M atm^-1) and in a 0.05 mol kg^-1 Ca²⁺, K⁺, NO₃^-, SO₄^2- solution (62 ± 0.8 M atm^-1). These Henry's Law coefficients are too small to allow for significant partitioning of methacrolein, methylvinyl ketone or methylbutenol into cloud water under equilibrium conditions.