Specification:

Assay: 99%min

Chloride(%):100ppm max

SO4(%):500ppm max

Heavy metal(%):10ppm max

PH:2.8-3.0,Fe(%):10ppm max

Appearance:whit powder

Storage: Be stored on shelves in dry and ventilated storehouse. Avoid direct sunshine, humidity, breakage of the bags and contamination.