In an area dedicated to bottled gases and away from any source of heat or flame.
Indefinite if stored safely.
Slightly in water and alcohol.
Oxygen can be generated by using 30% hydrogen peroxide (H2O2). It is vital that you give 30% H2O2 your highest level of safety consciousness; it is a very hazardous substance. Set up the apparatus to create a gas generator. A 250-mL flask, a two-hole rubber stopper, a delivery tube and a dropping funnel will be required. A drying tube containing anhydrous calcium chloride (Flinn C0016 or C0017) or Drierite (Flinn D0011 or D0012) will be required since the O2 will have an undesirably high water content. Place two grams of manganese dioxide (Flinn M0025 or M0026) in the flask. Now dilute 50 mL of 30% H2O2 to 100 mL using distilled water. Add H2O2 dropwise through the dropping funnel into the flask. This process will generate about 6 liters of oxygen. Do not use potassium chlorate to generate oxygen.