Most of our capsulated formulas have a shelf life of about 5-7 years. They should be kept in a cool, dark place. Your kitchen cabinet is fine-just not the one over the stove.
The Ortho Phos Liquid has a shelf life of about 3-5 years. You may choose to refrigerate the unused portion once opened, but this is not absolutely necessary. If the Ortho Phos becomes cloudy at any point, discard it.
