Argininosuccinic acid disodium salt hydrate is a sodium salt derivative of argininosuccinic acid, an intermediate in the urea cycle. It is a white to off-white crystalline powder that is highly soluble in water. This compound is chemically defined and serves as a key biochemical reagent. Its primary application is in the field of life science research and diagnostics. It is used as a standard or reference material in enzymatic assays and clinical chemistry, particularly for studying urea cycle disorders such as argininosuccinic aciduria. In pharmaceutical formulations, it can function as a buffering agent or an excipient due to its ionic and pH-regulating properties. The compound is handled as a biochemical and should be stored under appropriate conditions to maintain stability. It is used in controlled laboratory and manufacturing environments.