a process for purifying 1 , 1 , 3 , 4 , 4 , 6 - hexamethyltetralin is disclosed comprising melting crude 1 , 1 , 3 , 4 , 4 , 6 - hexamethyltetralin in methanol with heating , cooling the resulting suspension , and adding seed crystals at a temperature of 45 °- 60 ° c . ; as well as a process for purifying 1 , 1 , 3 , 4 , 4 , 6 - hexamethyltetralin comprising recrystallizing crude 1 , 1 , 3 , 4 , 4 , 6 - hexamethyltetralin from a mixed solvent of methanol and a solvent capable of easily dissolving 1 , 1 , 3 , 4 , 4 , 6 - hexamethyltetralin , the proportion of this solvent being 10 to 25 % by weight based on the weight of methanol . these processes make it possible to obtain 1 , 1 , 3 , 4 , 4 , 6 - hexamethyltetralin of high purity easily with high recovery by purifying crude 1 , 1 , 3 , 4 , 4 , 6 - hexamethyltetralin .