EPSOM SALT(Magnesium Sulfate Heptahydrate, USP), 50 lb multi-wall bag, Rx only, Manufactured by PQ Corporation, P.O. Box 840, Valley Forge, Pennsylvania USA 19482.
Failed Impurities/Degradation Specifications: Level of iron exceeds the limit set by the USP monograph for it (USP limit is NMT 0.5 ug/g (ppm)).
Kentucky
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=D-0564-2016