All media, the basal media as well as the special formulations, are prepared only with raw materials of the highest quality and with utmost care. The single components are dried according to the formulation and used anhydrously, to obtain a fine powder after pulverizing. This enables the user to dissolve the powder easily.
Media should be stored in a dry place and tightly closed
For more details, please follow https://uk.vwr.com/store/product/16064463/dehydrated-culture-media