Ozone friendly sterilant mixture

Details Ozone friendly sterilant mixture Ozone friendly sterilant mixture

A - Human Necessities

01

N

A01N 43/20 (2006.01) A61L 2/20 (2006.01)

Patent

CA 2143861

Non-ozone depleting sterilant compositions made of ethylene oxide and 1,1,1,2,3,3,3-heptafluoropropane. These composi- tions provide good sterilization characteristics, and are compatible with contemporary environmental concerns. One preferred aspect of the invention is a sterilant mixture comprising from about 20 mole percent to about 35 mole percent ethylene oxide and from about 65 mole percent to about 80 mole percent HFC-227ea. Compositions comprising from about 25 mole percent to about 30 mole percent ethylene oxide and from about 70 mole percent to about 75 mole percent HFC-227ea are preferred, with a com- position comprising about 27 mole percent ethylene oxide and about 73 mole percent HFC-227ea being most preferred. The fi- gure is a flammability diagram for sterilant compositions comprising ethylene oxide and 1,1,1,2,3,3,3-heptafluoropropane.

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