Product Name: Sodium metabisulfite(CAS No.: 7681-57-4) 99% Model NO.: 99% Grade Standard: Industrial Grade Type: Sodium Sulfide Purity: 90%~99% Appearance: Powder Colour: White Trademark: Changsheng Transport Package: 25kg PP Bag, with PE Liner. Specification: SGS Origin: Hebei Product Description Specifications1) Our strong item! competitive price!2) Passed through ISO 9001:2008 Certificate3) SO2: 65%min4) Stable supplier!Property: White or light-yellow crystalline powder, smell of SO2. No other smell when dried. Specific gravity is 1.4. It's soluble in glycerine, It's soluble slightly in alcohol.Specification: Sodium metabisulfite (as SO2)65% MinIron(Fe)0.003% MaxInsoluble matter in water0.05% MaxPH4.0-4.6Heavy metal(as Pb)0.002% maxArsenic(As)0.0002% max ConTAINER INSPECTION STANDARD CERTIFICATE OUR TEAM Factory FAQ1. Are you atrade company or factory?We are atrade company and we have our own factory.2. How do you control the quality?We control our qualiy by the factory testing department. We also can do FDA, BV, SGS or any other Third-party testing.3. What's your payment terms?T/T or L/C.4. What is loading port?Usually is Shanghai,Qingdao or Tianjin (Chinese main ports)Any questions, welcome to contact Anna Yuan TEL: 86-0311-83077544 Phone Number: 86-15303119589