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Specifications
| Grade | CP Grade |
| Appearance | White or slightly yellowish-white, non-sandy fine powder; odorless; insoluble in water and ethanol, soluble in dilute acid |
| Assay (ZnO, on dry basis) | 99.0% min |
| Identification | (1) Shall show positive reaction; (2) Shall show positive reaction |
| Alkalinity | Conforms to specification |
| Sulfate | 0.005% max |
| Carbonate and Acid-Insoluble Matter | Conforms to specification |
| Loss on Drying | 1.0% max |
| Iron Salt | 0.005% max |
| Lead Salt | Conforms to specification |
| Arsenic Salt | 0.0002% max |
| Lead | 0.005% max |
| Arsenic | 0.00003% max |
| Iron and Other Heavy Metals | Conforms to specification |
| Sieve Residue (45 μm sieve) | 0.10% max |
Applications
Zinc oxide is a versatile inorganic compound widely used across pharmaceuticals, cosmetics, rubber, ceramics, electronics, and agriculture. In the pharmaceutical and personal care industries, it is commonly applied in topical formulations such as ointments, creams, sunscreens, and diaper rash products for its protective and soothing properties. In cosmetics, zinc oxide functions as a physical UV filter, providing broad-spectrum protection against UVA and UVB radiation. Industrially, zinc oxide is an essential additive in rubber and tire manufacturing, where it acts as a vulcanization activator and improves elasticity, durability, and heat resistance. It is also used in ceramics, glass, pigments, and coatings, as well as in electronics and sensors due to its semiconducting and piezoelectric properties.
Benefits
Zinc oxide offers numerous advantages due to its multifunctional properties, chemical stability, and safety profile. It provides effective UV protection, antimicrobial activity, and skin barrier support, making it suitable for sensitive skin and medical applications. The compound is chemically stable under a wide range of conditions, ensuring consistent performance in industrial and consumer products. Zinc oxide is non-toxic, environmentally compatible when properly handled, and effective at low concentrations. Its versatility allows it to function as a protective agent, catalyst, pigment, and functional filler across diverse applications.
Conclusion
Zinc oxide is a highly valuable inorganic material with broad applications in healthcare, personal care, manufacturing, and advanced technologies. Its benefits, including UV protection, stability, safety, antimicrobial properties, and industrial versatility, make it an indispensable component in both consumer and industrial products. Continued use of zinc oxide supports innovation in health protection, materials science, and sustainable product development.
