Members of the public should only purchase medical gases from legitimate pharmacies approved by the Department of Health. They should also check the product packaging after purchase to ensure it is in order. The key items to check are as follow. For medical oxygen:

1.　External appearance must comply with regulations
» Medical oxygen - Black cylinder
» Cylinder is marked as "Medical Oxygen”

2.　Contents must comply with statutory specifications
» Oxygen content is over 99.0% v/v
» The fill pressure on the packaging of gaseous oxygen cylinders must be at least 120kg/c㎡/35℃.

» Liquid oxygen cryogenic containers (small liquid cylinders) should have a filled weight of over 160 kg.

3.　A Certificate of Analysis (COA) should be included with the prescription for inspection by the pharmacist.

4.　Proper labeling