Item Food grade (FCCIV) Industrial grade Assay % ≥99.5 ≥99.0 Melting range (℃) 184.0~187.0 184.0~187.0 Appearance …
Item Food grade (FCCIV) Industrial grade Assay % ≥99.5 ≥99.0 Melting range (℃) 184.0~187.0 184.0~187.0 Appearance of solution colorless transparent or practically colorless transparent colorless transparent or practically colorless transparent Chloride % ≤0.007 ≤0.007 Sulfate(SO42-)% ≤0.02 ≤0.02 Heavy metal (as Pb2+)% ≤0.001 ≤0.004 Fe Assay% ≤0.002 ≤0.002 Potassium permanganate reductive matter qualified qualified As (As2O3) ≤2PPM ≤2PPM
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