Linear 1-phenylalkane sodium sulphonates were prepared and their Krafft points were measured in presence of some added alcohols and/or electrolyte. Several equation models were investigated to evaluate the effect of alkyl chain length (hydrocarbon tail), added alcohols and/or electrolyte on their Krafft points. The Krafft point was found to correlate linearity with the number of carbon atoms in the alkyl chain, the added electrolyte weight%, and the square root of the added alcohol weight%. High values of R2 and F-ratio were obtained giving an indication that these equation models could be employed as predictive ones.