This is a replacement Taylor Calcium Buffer #10 reagent. This replacement reagent has a bottle size of 2 ounce.
Used to test Calcium Hardness test with Taylor Kits.
All reagents have a shelf life, whether they are liquids, powders, crystals, tablets, or test-strip pads. If kept dry, powders and crystals are very stable; acids are also long lived. Date of manufacture is not the controlling factor when it comes to shelf life – storage conditions are more important.