are the Sechenov constant and concentration of ion i, respectively. The Sechenov constants utilized in this work are summarized in the Supporting Information. Note that several input parameters remain freely adjustable for fitting the observed aerosol kinetics of binary STS and ternary STS/sucrose systems, and they are listed in Table . Three types of fitting scenarios are also listed in Table , and they are utilized to characterize the following physicochemical properties associated with the aerosol kinetics: Scenario 1 for surface reaction (k SLR ), Scenario 2 for molecular diffusivity (D b,T ) and Scenario 3 for surface ion depletion (θ ss ). The applications of these scenarios will be discussed in details in the following sections. 10 -12 -10 -5 fixed g fixed g fixed h θ ss 0 -1 fixed to 0 fixed to 0 adjustable a For binary STS. b For ternary STS : sucrose. c Provided by eq 2 and droplet ionic strength. d Provided by eq S11 and droplet ionic strength. e Provided by eq S10, the Stokes-Einstein equation (eq S9) and [STS] b,0 . f Coupled to fitted D b,T via eq S9. g Provided by eq 1, [STS] b,0 and [sucrose] b,0 . h Coupled to θ ss via assuming [STS] in eq 1 =