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Check the listing for details. Silicon, Metal Element, Lumps, Casting / Technical Grade, 99%, 1000g (2.2 pound). Condition: New. Listed at 29.00 USD. Boiling Point: 3538 °C. The Purity is 99% min. Specified impurities are Fe < 0.30%, Al < 0.30%, Ca < 0.05%, Ti < 0.05%, C < 0.15%.