Description_x000D_ General description_x000D_ Roswell Park Memorial Institute medium is commonly referred as RPMI. It is a form of medium used in cell culture and tissue culture. This medium contains phosphate and is formulated for use in a 5% carbon dioxide atmosphere. RPMI 1640 is used for the serum-free expansion of human lymphoid cells._x000D_ Application_x000D_ RPMI 1640 Vitamins Solution (100×) is used as a supplement in cell culture media.