Used in agriculture as a fertilizer to correct zinc deficiency in soils, especially for crops like corn, rice, and citrus. Applied through soil drenching, foliar spraying, or in irrigation systems (fertigation). In animal nutrition, added to feed or drinking water to support growth, immune function, and prevent zinc deficiency in livestock and poultry. Commonly used in the manufacturing of rayon and other industrial processes. Also found in some medicinal products for treating zinc deficiency in humans and as an astringent in topical treatments.