Ethyleneiminomethylguaiacol manganese chloride, also known as EUK-134, is a highly purified synthetic component that mimics the activity of superoxide dismutase (SOD) and catalase (CAT) in vivo. EUK-134 appears as a reddish brown crystalline powder with a slight unique odor. It is slightly soluble in water and soluble in polyols such as propylene glycol. It decomposes when exposed to acid.Cosmate®EUK-134,is a synthetic small molecule compound similar to antioxidant enzyme activity,and an excellent antioxidant component,which can brighten skin tone,fight against light damage,prevent skin aging,and alleviate skin inflammation.