Zinc Sulphate Powder is an eye irritant. Ingestion of trace amounts is considered safe. Zinc Sulphate Powder is added to animal feed as a source of essential zinc, at rates of up to several hundred milligrams per kilogram of feed. Excess ingestion results in acute stomach distress, with nausea and vomiting appearing at 2-8 mg/Kg of body weight. Avail Zinc Sulphate Powder from us at very reasonable rates.