Polar Pure Water Disinfectant:
- 99.5% Crystalline Iodine
- 0.5% Inert Ingredients
Shelf life: indefinite
Size: 76 mm tall
Weight: 85 grams
Kills: Giardia, viruses
Cost: $US 15
Treats: 500 gallons
Taste: Adds iodine odor to water above 2-3 parts per million.
From the Center for Disease Control
Crystalline Iodine (found at some chemical companies and sporting goods stores) First make a saturated solution and then measure your own dose to add to water. The crystalline form stores well indefinitely and new batches of the saturated solution can be made from a small amount of crystals each time you take a trip.
To prepare a stock of Crystalline Iodine saturated solution:
- Place 4-8 grams of crystalline iodine into a 1-2 oz container and fill with water. Note: 1oz=6 teaspoons.Warning: crystalline iodine at 4-8 grams is a lethal dose if accidentally swallowed in a single dose. Keep out of the reach of children.
- Shake the bottle vigorously for 1 minute. Allow several additional minutes for the iodine to maximally dissolve in the available water. Some crystals should always be visible; if they totally dissolve, then more crystals should be added to the container to insure that iodine saturation of the stock solution has been achieved.
- If the water to be treated is clear, add 13 ml of saturated iodine solution — liquid above the crystals, not the crystals themselves — per Liter or Quart. Note: 5 ml= 1 teaspoon. 13 ml = about 2.5 teaspoons
- In cloudy water, add 26 ml of saturated solution per Liter or Quart.
Note: Allow the solution to stand 20 minutes before drinking the disinfected water when the water temperature is 20-25Â°C (68-77Â°F). Increase the standing time with colder water. For each 10Â° less than 25Â°C (77Â°F), allow the water to stand for double the time before drinking.