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J Cosmet Sci. 2003 Mar-Apr;54(2):113-8.

Potentiometric/turbidometric titration of antiperspirant actives.

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  • 1Department of Agronomy, Purdue University, West Lafayette, IN 47907, USA.


A titration procedure that simultaneously monitors the pH and turbidity of an antiperspirant solution during neutralization with sodium hydroxide was developed to characterize antiperspirant actives. Aluminum chloride, aluminum chlorohydrate (ACH), and aluminum zirconium glycine complex (AZG) gave distinctive pH/turbidity profiles. The activated forms of aluminum chlorohydrate (ACH') and aluminum zirconium glycine complex (AZG') produced more turbidity than the non-activated forms. On an equimolar basis, AZG' produced more turbidity than any of the antiperspirant actives tested.

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