Packaging and storage—
Preserve in suitable, tight containers.
Labeling—
Label it to indicate the method of preparation and that it is not for parenteral administration.
Water conductivity 
645
—
Perform
Stage 2, Step 4 using a sufficient amount of water to perform the test. The conductivity is not more than 25 µS/cm for containers with a nominal volume of 10 mL or less at 25 ± 1
; and not more than 5 µS/cm for containers with a nominal volume greater than 10 mL at 25 ± 1
.
Oxidizable substances—
To 100 mL, add 10 mL of 2 N sulfuric acid, and heat to boiling. For Sterile Purified Water in containers having a fill volume of less than 50 mL, add 0.4 mL of 0.02 M potassium permanganate, and boil for 5 minutes; where the fill volume is 50 mL or more, add 0.2 mL of 0.02 M potassium permanganate, and boil for 5 minutes. If a precipitate forms, cool in an ice bath to room temperature, and pass through a sintered-glass filter: the pink color does not completely disappear.
