Betamethasone disodium phosphate (Standard) is the standard substance of Betamethasone disodium phosphate, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Betamethasone disodium phosphate (Betamethasone 21-phosphate disodium salt) is a corticosteroid with anti-inflammatory activity that promotes the polarization of M1 to M2 macrophages by decreasing the secretion of pro-inflammatory cytokines, and is used in the study of keloids and rheumatoid arthritis.