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Calcium carbonate is a chemical compound with the formula CaCO3. It is a common substance found in rocks as the minerals calcite and aragonite (most notably as limestone, which contains both of those minerals) and is the main component of pearls and the shells of marine organisms, snails, and eggs. Calcium carbonate is the active ingredient in agricultural lime and is created when calcium ions in hard water react with carbonate ions to create limescale.
Magnesium Hypophosphite ( CAS 10377-57-8 ),white crystal, there are fluorescent.Show neutral or weak acid soluble in water, its aqueous solution, insoluble in ethanol and aether.Relative density 1.59 (12.5/4 ℃).Easy weathering in dry air, and 100 ℃ when lose 5 molecular crystal water.At 180 ℃anhydride, continue to heat, the decomposition released flammable and poisonous phosphine gas. It can be used in medicine, also can be used as analytical reagent.
Buy 2,6-Dinitrotoluene/2,6-DNT DNT
2,6-Dinitrotoluene is a kind of off-white crystal powder or ight yellow needlelike crystals, insoluble in water, soluble in ethanol, ether