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Eco-Friendly Chemical Powder Jinchan Powder Gold Concentration Agent. High Efficiency Gold Leaching: Organic material powder designed for effective gold extraction treatment. Long Shelf Life: Maintains stability and effectiveness for up to 2 years. Large Production Capacity: Capable of producing 20,000 tons per month to meet high demand. Free Sample Available: Customers can receive free samples, only shipping cost is required. Fast Delivery Time: Standard delivery within 7 to 15 days after order confirmation. COA Certificate Provided: Comes with Certificate of Analysis to ensure product quality standards.