pure white, more than 99% of the purity , good quality, abundant supply Standard:Industry grade: food gradeDescription : white or yellow crystalline powder,pure whiteLoss on drying: ≤0.5%,<0.4%Heavy metals: ≤0.002%,<0.001%Lead: ≤0.001%,<0.001%Chloride: ≤0.07%,<0.04%Sulphate: ≤0.05%,<0.04%Arsenic: ≤3ppm,<2ppmReducing substances: ≤0.5%,0.3%Assay: ≥98.0%,>99%Usage:This product is widely used in ...