Dhalada reagent waa nooc ka mid ah dhalada sheybaarka shaybaarka loo isticmaalo kaydinta iyo bixinta dib-u-haynta kiimikada kiimikada. Regulayaashu waa walxaha loo isticmaalo fal-celinta kiimikada ama falanqaynta sheybaarka si loo soo saaro isbedel kiimiko ah ama lagu garto, lagu cabbiro, ama tijaabiyo walxaha kale. Dhalo dhalo ah ayaa si gaar ah loogu talagalay in si nabdoon loogu habeeyo laguna badbaadiyo dadkan.
Dhalo dhalo ah ayaa caadi ahaan ka samaysan dhalo, in kastoo noocyada balaastigga ah ee sidoo kale loo heli karo codsiyada qaarkood. Dhalooyinka dhalada dhalada ah ayaa la door bidaa sababta oo ah waa kuwo kimikal ah, taasoo la micno ah inaysan ka falcelin inta badan kiimikada badankood hana wasakhoobin in la keydiyo.