Sodium aluminate CAS 11138-49-1 NaAlO₂‌

Sodium aluminate, with the chemical formula NaAlO2, is a white crystalline powder that is easily hygroscopic, highly soluble in water, and insoluble in ethanol. Its aqueous solution is alkaline, but it undergoes hydrolysis reaction in water to produce aluminum hydroxide (Al (OH) 3) and sodium hydroxide (NaOH). In fact, sodium metaaluminate (NaAlO2) is a shortened form of sodium tetrahydroxyaluminate (Na [Al (OH) 4]). Its actual composition structure is relatively complex, existing in the form of [Alhemicalbook (OH) 4] - in aqueous solution, but commonly written as NaAlO2. In fact, it mostly exists in the form of AlO2- in the molten state. NaAlO2 is an ionic compound composed of sodium ions and aluminate ions. Generally, it is also achieved by reacting aluminum with sodium hydroxide solution, but the reaction conditions and subsequent processing are different. For example, the reaction is carried out at a higher temperature and a specific concentration of sodium hydroxide solution, and then concentrated and crystallized to obtain sodium metaaluminate.