Synthesis of bisphenol A diglycidyl ether The commonest epoxy resins are dependant on reacting epichlorohydrin (ECH) with bisphenol A,  resulting in a distinct chemical substance called bisphenol A diglycidyl ether (typically generally known as BADGE or DGEBA). Stain Handling: Most substances won’t stain epoxy if taken off, but in the event