Dexamethasone phosphate (Standard) is the analytical standard of Dexamethasone phosphate. This product is intended for research and analytical applications. Dexamethasone phosphate (Dexamethasone 21-phosphate) disodium is a biologically inactive compound which undergoes dephosphorylation by intra-erythrocyte enzymes. The active metabolite, Dexamethasone, is then released into the circulation by simple passive diffusion through cell membranes. Dexamethasone phosphate disodium-encapsulated erythrocyte has the potential for steroid-dependent ulcerative colitis research.