Manganese is a silver-gray metal, much like iron, but softer than iron. If manganese contains a small amount of impurities-carbon or silicon, it becomes very hard and brittle. However, pure metallic
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Hydroxyethyl cellulose for dialy use chemicals,It is a white or light yellow, tasteless, non-toxic fibrous or powder solid, which is prepared by etherification of basic cellulose and ethylene oxide
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