Description: Manganese metal 50g+ for element collections. Manganese is a chemical element; it has symbol Mn and atomic number 25. It is a hard, brittle, silvery metal often coated in a tan to brown oxide layer that protects the underlying metal from oxidation, often found in minerals in combination with iron. Manganese was first isolated in the 1770s. Manganese is a transition metal with a multifaceted array of industrial alloy uses, particularly in stainless steels. It improves strength, workability, and resistance to wear. Manganese oxide is used as an oxidising agent; as a rubber additive; and in glass making, fertilisers, and ceramics. Manganese sulfate can be used as a fungicide. Manganese is also an essential human dietary element, important in macronutrient metabolism, bone formation, and free radical defense systems. It is a critical component in dozens of proteins and enzymes. It is found mostly in the bones, but also the liver, kidneys, and brain. In the human brain, the manganese is bound to manganese metalloproteins, most notably glutamine synthetase in astrocytes. It is familiar in the laboratory in the form of the deep violet salt potassium permanganate. It occurs at the active sites in some enzymes. Of particular interest is the use of a Mn-O cluster, the oxygen-evolving complex, in the production of oxygen by plants. Manganese is a silvery-gray metal that resembles iron. It is hard and very brittle, difficult to fuse, but easy to oxidize and most often has a thin tan to brown oxide layer protecting the underlying metal. Manganese metal and its common ions are paramagnetic. Manganese tarnishes slowly in air and oxidizes ("rusts") like iron in water containing dissolved oxygen. Common oxidation states of manganese are +2, +3, +4, +6, and +7, although all oxidation states from 3 to +7 except 2 have been observed. Manganese in oxidation state +7 is represented by salts of the intensely purple permanganate anion MnO4. Potassium permanganate is a commonly used laboratory reagent because of its oxidizing properties; it is used as a topical medicine (for example, in the treatment of fish diseases). Solutions of potassium permanganate were among the first stains and fixatives to be used in the preparation of biological cells and tissues for electron microscopy. You will receive 50g+ or more in a plastic bottle for element collections. That bottle will be labeled and will be bubble wrapped and placed inside of a box for shipping. That box will be packed in a blue bubble wrap padded envelope and shipped using USPS Ground Advantage with tracking.
Price: 8.95 USD
Location: Salt Lick, Kentucky
End Time: 2024-09-06T10:27:01.000Z
Shipping Cost: 4.95 USD
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Item Specifics
All returns accepted: ReturnsNotAccepted
Country/Region of Manufacture: United States
California Prop 65 Warning: N/A
