Phosphate Buffered Saline (PBS) with Tween 20 wash buffer for use during immunolabeling techniques such as IHC.

In order to provide this product at 20x, the salts in solution are at a very high concentration. It has been found that at temperatures below 44 degrees F (6 degrees C), the salts fall out of solution. If this occurs during your shipment conditions, please stir the product to get the salts back into solution.