Ethylene oxide sterilization process indicator inks

Details Ethylene oxide sterilization process indicator inks Ethylene oxide sterilization process indicator inks

A - Human Necessities

61

L

A61L 2/28 (2006.01) C09D 11/02 (2006.01) A61L 2/20 (2006.01) C09B 11/06 (2006.01) C09B 29/085 (2006.01)

Patent

CA 2432748

Water-based chemical indicator inks for ethylene oxide sterilization processes and methods for its use. The chemical indicator ink contains at least one pH indicator dye selected from the group consisting of Bromocresol green, Bromophenol blue, Methyl red, Ethyl orange, and combinations thereof. The pH indicator dye undergoes an irreversible color change when exposed to ethylene oxide vapor in the presence of low-temperature steam, but when exposed to other sterilization processes either does not undergo a color change or undergoes a color change that is different than is obtained when exposed to ethylene oxide.

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