Aluminum nitrate nonahydrate

Chemical formula: AL(NO3)3•9H2O Aluminum nitrate, also called nitric acid aluminum, is colorless rhombic crystals with high hygroscopicity that begin to smoke upon exposure to air. It is a fairly strong oxidizing agent, and in its anhydrous form, it has increased explosive hazard when interacting with organic solvents such as ether and benzene. This substance has found fairly wide application in various industries. In the textile industry, an aqueous solution and nonahydrate of this substance are used as a mordant in the process of dyeing fabrics; in the oil industry, the substance acts as a catalyst in oil refining. Aluminum nitrate can also be used for corrosion protection, in the extractive leather industry, in nuclear physics, and in the production of insulating paper materials, heating elements, antiperspirants, and incandescent filaments. In addition, it is used in the foundry industry in the process of preparing molding mixtures. To obtain nitric acid aluminum with the formula Al(NO3)3, several methods are used: Aluminum hydroxide is dissolved in nitric acid; Exchange decomposition of aluminum sulfate; Exchange decomposition of alum with lead citrate. This chemical substance is widely used as a mordant to obtain an alizarin red shade in the process of dyeing fabrics, as well as in the manufacture of gas mantles. An aqueous solution of aluminum nitrate has a significant degree of hydrolysis. To obtain a salt containing crystallization water from a solution with high acidity, it is evaporated in the form of colorless hygroscopic crystals. The solubility of the substance at a temperature of 25° Celsius is 63.7 grams of aluminum nitrate per 100 grams of water. To obtain basic nitrates, metallic aluminum is treated with nitric acid aluminum. The structure of the basic double nitrate 2Ca(OH)2∙Al(OH)2NO3∙2H2O is, similarly to chloride with a similar composition, double-layered, and the water in this substance is zeolitically bound and begins to be lost over P2O5 at room temperature. The scientist Feitknecht managed to establish the ability of aluminum-calcium hydroxysalt with the corresponding composition to bind various anions, including: Cl-, NO3-, Br-, I-, ClO3-, IO3-, ClO4-, MnO4-, which have practically the same type of structure. Between the main layers, built from Ca2+ ions with an interval of 3.32 Å, intermediate layers are located. They are removed from the main layer at a distance depending on the size of the anion itself. In the gaps between the layers, water is located, to a certain extent zeolitically bound. In this case, most often a certain amount of acid ions can be replaced by hydroxyl ions, as a result of which a certain change in the composition of the compounds can vary within certain limits. Aluminum nitrate nitric acid 9-water GOST 3757-75 Warranty storage period 1 year. Editor: nbo51k