When filling medical oxygen cylinders it is critically important now more than ever toperform pre-fill odor testingas part of the required nine (9) pre-fill checks.We wanted clarify and stress the importance ofthe absolute safety and regulatory requirement of pre-fill odor testing every medical oxygen and air cylinder prior to filling. The latest USP 99 monograph dropped the requirement forpostfilling odor testing, however we strongly recommend continuing to perform the post odor testing as well. Please review the pre-fill steps below and ensure you are following this cGMP requirement. Pre-Fill Inspection Verify hydrostatictest dateis current Aluminum cylinders must be within 5 years Steel cylinders must be within 10 years if star is present Verify correct cylindercolor In United States oxygen color is green In Canada and many other countries oxygen color is white Performhammer teston steel cylinder only. Aluminum cylinders are exempt. Strike outside of cylinder with a hammer
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