Crystalline aluminum, also known as hexahydrate aluminum, is an inorganic compound with the chemical formula AlCl3·6H2O. This substance is a white crystalline powder that dissolves in water but not in alcohol. Its melting point is 63.5°C, and its boiling point is 181°C. Crystalline aluminum has a wide range of applications across various industries. In the paper industry, it serves as a sizing agent to enhance the quality and strength of paper. In the fire protection industry, it forms a multi-foam fire extinguisher with baking soda and foaming agents, used to extinguish fires caused by oil, organic solvents, and more. In the inorganic industry, it is used to produce other aluminum salts like alum, potash alum, and ammonium alum. In the organic industry, it can act as a catalyst for organic synthesis, such as the synthesis of blue dyes. In the pharmaceutical industry, it can be used as astringents, anticaries agents, anticoagulants, antiperspirants, and hemostatic astringents. Additionally, in the oil industry, crystalline aluminum can be used as a well drilling mud stabilizer and for treating oil-contaminated wastewater. Please note that crystalline aluminum is irritant to the skin, eyes, and mucous membranes; inhalation can cause coughing and respiratory irritation. During production and use, adhere to safety operating procedures, ensure good ventilation in the work environment, wear protective gear, and avoid direct contact. In case of accidental contact, rinse immediately with clean water and seek medical assistance.