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Suoyi High Quality Copper Oxide Cuo for Welding Powder. High Purity Grade: Assay Copper 88.13%, Oxygen 11.69%, suitable for industrial welding powder. Specific Application: Raw material specifically used for welding powder in exothermic welding. Standard Compliance: Meets GB standard with CAS NO. 1317-38-0 and EINECS NO. 215-269-1. Low Impurity Content: Insolubles in Hydrochloric Acid 0.01%, Total chloride 0.005%. Flexible Packaging: Available in Barrel, Iron Drum, or Plastic Bucket options. Sample Availability: Samples are available for customer evaluation. Experienced Team: Technical team with rich chemical industry experience and 2 R&D engineers. Fast Lead Time: Peak and off-peak season lead time within 15 workdays.