Method for obtaining aqueous formulations of oxidation-sensitive active principles

  • US 20040054012A1
  • Filed: 08/04/2003
  • Published: 03/18/2004
  • Est. Priority Date: 06/06/2000
  • Status: Active Grant
First Claim
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1. A method for preparing an aqueous solution with an active principle of a phenolic nature susceptible to oxidation, while preserving for a prolonged period, characterized in that use is made of deoxygenation of the solution by bubbling with at least one inert gas and/or placing under vacuum, until the oxygen content is below 2 ppm, in that the aforementioned aqueous solution with an active principle is possibly topped with an inert gas atmosphere and placed in a closed container in which the prevailing pressure is 65,000 Pa maximum, in that the oxygen content of the aqueous solution is below or equal to 2 ppm, and in that the effect of the deoxygenation of the solution is completed by addition of an antioxidant.

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