Polyhydric alcohol stabilized antiperspirant salt solutions

A method of stabilizing an aqueous solution of an enhanced efficacy aluminum or aluminum-zirconium antiperspirant salt against rapid degradation of the HPLC peak 4 to peak 3 area ratio of said salt, wherein said salt has an HPLC peak 4 to peak 3 area ratio of at least 0.5 with at least 70% of the aluminum contained in said peaks 3 and 4, said method comprising adding to said aqueous enhanced efficacy antiperspirant salt solution an effective amount of a polyhydric alcohol having from 3 to 6 carbon atoms and from 3 to 6 hydroxyl groups to form a stabilized aqueous enhanced efficacy antiperspirant salt solution comprising about 20 to 42% of said antiperspirant salt, about 25 to 60% water, and about 10 to 40% of said polyhydric alcohol.

A method of preparing a stabilized aqueous enhanced efficacy aluminum antiperspirant salt solution which comprises heating an aqueous solution of an aluminum antiperspirant salt in the presence of a polyhydric alcohol having from 4 to 6 carbon atoms and from 4 to 6 hydroxyl groups at a temperature of at least 50.degree. C. for a time sufficient to convert the aluminum antiperspirant salt to an enhanced efficacy aluminum antiperspirant salt having an HPLC peak 4 to peak 3 area ratio of at least 0.5 with at least 70% of the aluminum contained in said peaks 3 and 4.

A stabilized aqueous antiperspirant composition comprising, in percent by weight (USP), about 18 to 45% of an enhanced efficacy aluminum or aluminum-zirconium antiperspirant salt having an HPLC peak 4 to peak 3 area ratio of at least 0.5 with at least 70% of the aluminum contained in said peaks 3 and 4, about 20 to 70% water, and about 5 to 60% of a polyhydric alcohol having from 4 to 6 carbon atoms and from 4 to 6 hydroxyl groups.

A method of stabilizing an aqueous solution of an enhanced efficacy aluminum or aluminum-zirconium antiperspirant salt against rapid degradation of the HPLC peak 4 to peak 3 area ratio of said salt, wherein said salt has an HPLC peak 4 to peak 3 area ratio of at least 0.5 with at least 70% of the aluminum contained in said peaks 3 and 4, said method comprising adding to said aqueous enhanced efficacy antiperspirant salt solution an effective amount of a polyhydric alcohol having from 4 to 6 carbon atoms and from 4 to 6 hydroxyl groups to form a stabilized aqueous enhanced efficacy antiperspirant salt solution comprising about 18 to 45% of said antiperspirant salt, about 25 to 70% water, and about 5 to 60% of said polyhydric alcohol.