The aqueous solubilities and octanol-water partition coefficients of o-cymene, m-cymene, p-cymene, 2,3-dichloro-p-cymene 2,5-dichloro-p-cymene, 2,3,6-trichloro-p-cymene and tetrachloro-p-cymene, were determined at 25 degrees C using GC and HPLC methods. These properties correlate well with additive LeBas molar volumes.