Titan's lakes chemical composition: Sources of uncertainties and variability

► Following the work of Dubouloz et al. (1989) and Cordier et al. (2009) we estimated the uncertainties on theoretical determinations of Titan's hydrocarbon lakes chemical composition. ► We performed Monte Carlo simulations of errors on thermodynamic data and found uncertainties on liquid mole fraction up to ∼300% (standard deviation). ► The model of Titan's atmosphere is to be improved: the predicted precipitation rates vary substantially between models, impacting the resulting composition derived for the lakes. ► Laboratory experiments are required in order to get more reliable predictions in the perspective of future space missions.