Cobalt High Purity Metal Sample Co 27 by Urban Scientific at Dupen Labs. MPN: UMCMCO10. Hurry! Limited time offer. Offer valid only while supplies last. You will receive a piece of ~1gr of 99.99% pure element, it could be in form of lingot or chip. Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Symbol: Co CAS Number: 7440-48-4 Atomic mass: 58.933 gr/mol Appearance: lustrous silvery-gray
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