Synonyms(2R)-2,4-Dihydroxy-3,3-dimethylbutanoic acid; Dexpanthenol EP Impurity B Close (2R)-2,4-Dihydroxy-3,3-dimethylbutanoic acid; Dexpanthenol EP Impurity B Related products Calcium pantothenate EP Impurity B (Purity ≥90%) M.F. M.W. 148.2 CAT# AR-P29726 CAS# 1112-33-0