The Probert Encyclopaedia of Science & Technology

ZINC OXIDE

Zinc oxide is a powder, white when cold and yellow when hot with the formula ZnO. It occurs naturally as a reddish orange ore - zincite, and can also be made by oxidizing hot zinc in air. It is amphoteric, forming zincates with bases. It is used as a brilliant permanent white pigment (Chinese white) and a mild antiseptic in zinc ointments. It was formerly known as philosopher's wool.
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