What storage conditions apply before and after opening the 300 g or 400 g multidose container of the Sovereign Medical calcium polystyrene sulfonate 99.75% powder for oral and rectal suspension product?

The Sovereign Medical calcium polystyrene sulfonate 99.75% powder for oral and rectal suspension product requires no special storage conditions before opening; after first opening a 300 g or 400 g multidose container, do not store above 25°C and keep the container tightly closed.