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Zinc oxide is an inorganic compound with the formula Zn O.It is a white powder which is insoluble in water. ZnO is used as an additive in numerous materials and products including cosmetics, food supplements, rubbers, plastics, ceramics, glass, cement, lubricants, [12] paints, sunscreens, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants, semi conductors ...
In pharmacology, paste is a basic pharmaceutical form. It consists of a fatty base (e.g., petroleum jelly) and at least 25% of a solid substance (e.g., zinc oxide). Pharmaceutical pastes are typically intended for external application to the skin. They are usually thick and do not melt at physiologic temperatures. [1]
Devitrifying solders frequently contain up to 25% zinc oxide. In production of cathode ray tubes, devitrifying solders based on PbO-B 2 O 3-ZnO are used. Very low temperature melting glasses, fluid at 200–400 °C (390–750 °F), were developed for sealing applications for electronics.
Zinc oxide paste has also been popular for skin protection for thousands of years. [16] Among the nomadic sea-going Sama-Bajau people of the Philippines, Malaysia, and Indonesia, a common type of sun protection is a paste called borak or burak, which was made from water weeds, rice and spices.
Mecca Ointment is the product name of a first aid ointment used for the temporary relief of pain and/or itching associated with minor burns, sunburn, minor cuts, scrapes, insect bites and for the temporary protection of minor skin irritations. The formulation contains the medicinal ingredients Phenol 0.5%, Camphor 0.5% and Zinc Oxide 1.25%.
Calamine is a combination of zinc oxide and 0.5% ferric oxide (Fe 2 O 3). [6] The lotion is produced with additional ingredients such as phenol and calcium hydroxide. [6] [7] The use of calamine lotion dates back as far as 1500 BC. [8] It is on the World Health Organization's List of Essential Medicines. [9]