HEBEI HUANWEI BIOTECH CO.,LTD.
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Zinc oxide is white crystal or powder, belonging to the hexagonal crystal system. Odorless, non-toxic, sand free, fine quality.Insoluble in water and ethanol, soluble in acid, sodium hydroxide, ammonium chloride, amphoteric oxide. Yellow when heated at high temperature and white when cooled. In humid air, it absorbs carbon dioxide and water and gradually becomes basic zinc carbonate. |
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