OthernamesAmmoniumPeroxydisulfateIdentifiersCASnumber7727-54-0PropertiesMolecularformula(NH4)2S2O8Molarmass228.18g/molAppearancewhitecrystalsMeltingpoint120°C(393K)(decomposes)Solubilityinwater80g/100ml(25°C)RelatedcompoundsOthercati***SodiumpersulfatePotassiumpersulfateAmmoniumpersulfate(NH4)2S2O8isastrongoxidizingagent.Itisverysolubleincoldwater,alargefalloftemperatureaccompanyingsolution.Itisaverystrongoxidizingagentandaradicalinitiator.Itisusedtoetchcopperonprintedcircuitboa***asanalternativetoferricchloridesolution.[1]Itisalsousedalongwithtetramethylethylenediaminetocatalyzethepolymerizationofacrylamideinmakingapolyacrylamidegel.AmmoniumpersulfatewaspreparedbyH.Marshallbythemethodusedforthepreparationofpotassiumpersulfate—bytheelectrolysisofasolutionofammoniumsulfateandsulfuricacid.AmmoniumpersulfateisthemaincomponentofNochromix.Ondissolvinginsulfuricacid,itisusedtocleanlaboratoryglasswareasametal-freealternativetochromicacidbaths.)