Letter Re: Using Pocket Hand Warmers for Storing Food in HDPE Buckets
Jim, A typical small chemical hand warmer packet [that employs an oxidation process] absorbs about 1.25 grams of O². (This was calculated from weighing on a lab scale.) So at 32 grams per mole for O² or 22.4 liters at standard temperature and pressure that is 32/22.4=1.4286 grams of O² per liter. Assuming O² in the air at 20%, a 5 gallon bucket (18.92 liters) would contain 1.4286 x 18.92 x 20% = 5.4 grams of O² It would take roughly 4 packets to absorb the O² in a 5 gallon HDPE bucket at 1.25 grams per packet if the …