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China Ferrous Sulphate Feso4 with Factory Direct Wholesale Price. Factory Direct Supply: Wholesale prices directly from Chinese factory with flexible packaging. Global OEM/ODM: Professional OEM and ODM services available for industrial and agricultural needs. Strict Quality Control: Certified by ISO, SGS, REACH, COA, and MSDS with rigorous testing standards. Fast Delivery: Off-season lead time within 15 workdays; peak season within one month. Trusted Supplier: Products trusted by clients in over 50 countries with rich market experience. Multiple Specifications: Available in 99.5%, 99%, and 98% min content with various crystal forms. Comprehensive Certifications: Full compliance with international standards including ISO, SGS, and REACH.