betamethasone phosphate betamethasone phosphate betamethasone sodium phosphate is a synthetic glucocorticoid corticosteroid and a corticosteroid ester. betamethasone phosphateclinical dataother namesbetamethasone 21-phosphate disodium saltdrug classcorticosteroid; glucocorticoididentifiers iupac name disodium (11β,16β)-9-fluoro-11,17-dihydroxy-16-methyl-3,20-dioxopregna-1,4-dien-21-yl phosphate cas number360-63-4pubchem cid65478drugbankdb00443chemspider58930uniiyjo1f9w10rkeggd00972chebichebi:3078chemblchembl1200762comptox dashboard (epa)dtxsid8047137 echa infocard100.005.271 chemical and physical dataformulac22h28fna2o8pmolar mass516.410 g·mol−13d model (jsmol)interactive image smiles c1c23ccc4=cc(=o)c=c4(3((c2(1(c(=o)cop(=o)())o)c)o)f)c.. inchi inchi=1s/c22h30fo8p.2na/c1-12-8-16-15-5-4-13-9-14(24)6-7-19(13,2)21(15,23)17(25)10-20(16,3)22(12,27)18(26)11-31-32(28,29)30;;/h6-7,9,12,15-17,25,27h,4-5,8,10-11h2,1-3h3,(h2,28,29,30);;/q;2*+1/p-2/t12-,15-,16-,17-,19-,20-,21-,22-;;/m0../s1key:plcqgrypoisrtq-lwcnahddsa-l