Crystalline aluminum, also known as hexahydrate aluminum, is an inorganic compound with the chemical formula AlCl3·6H2O. It is a white crystalline powder that dissolves in water but not in organic solvents. Its melting point is 63.5°C and boiling point is 181°C. Crystalline aluminum has wide applications across various fields. 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 foam extinguishing agent 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 catalyst for dyeing blue. In the pharmaceutical industry, it can be used as astringents, anticaries agents, anticoagulants, antiperspirants, hemostatic agents, and more. Additionally, in the oil industry, crystalline aluminum can be used as a mud stabilizer for oil well drilling and for treating oily wastewater. Please note that crystalline aluminum can be irritating to the skin, eyes, and mucous membranes, and inhalation may cause coughing and respiratory irritation. During production and use, adhere to relevant safety 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.