| abstract |
A method of providing an antiperspirant active having the empirical formula A12(OH)6-axaYH20, wherein X is C1, Br or I, Y is between 1.5 a 2.5 and a is 0.8 to 1.33, comprising heating an aqueous solution of aluminium halide or HX and aluminium metal for a time period sufficient for the aluminium metal to dissolve, and subsequently ageing the solution of dissolved aluminium for a period of 50 minutes to 21 days at a temperature of 80-130 °C, such that the Al/X ratio in the resulting solution is between 1.5:1 and 2.0:1, and such that the aluminium concentration in the resulting solution is between 0.5 and 3.8wt%. |