Opinion ID: 2788497
Heading Depth: 3
Heading Rank: 1

Heading: A method for preparing an aqueous solution

Text: with an active [principle of phenolic] nature susceptible to oxidation, which is paracetamol, while preserving for a prolonged period, comprising 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, and op- tionally the aforementioned aqueous solution with an active principle is topped with an inert gas at- mosphere heavier than air and placed in a closed container in which the prevailing pressure is 65,000 Pa maximum, and the oxygen content of the aqueous solution is below 2 ppm, and optional- ly the deoxygenation of the solution is completed by addition of an antioxidant.