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900kg Bag for 70% High Quality Sodium Hydrosulphide Nahs Yellow Flakes. Flexible Packaging: Available in 25kg, 50kg, 900kg, and 1000kg bags. Comprehensive Certifications: Certified by CCIC, CIQ, ISO, and RoHS standards. Free Sample Policy: Free samples available; customer only pays courier cost. Quality Guarantee: Replacement or refund support for quality issues upon confirmation. Annual Capacity: Production capacity of 30,000 tons per year. Global Shipping: Ships from Tianjin, Qingdao, or Xinjiang ports via FOB, CIF, CFR, or EXW.