Physic-chemical properties High quality product Class 1 product Qualified product
Whiteness(%) More than 90 More than 88 More than 85
Fineness,325 mesh (45 micron) More than 98
Moisture content(%) Less than 0.5
Iron salt Does not display blue color instantly
Soluble substance in water (%) Less than 0.1
Soluble substance in acid (%) Less than 3.0
Loss of ignition (1000centigrade)(%) Less than 6.5
As Less than 310-4
Pb Less than 2010-4
Mount of fungus,one/g Less than 500
Moulds,one/g Less than 100
Colibacillus,staphylococcus,bacillus pyocyaneus Can not be detected
Industrial Usage: Medical pills,sugarcoatings,prickly-heat powder,traditional Chinese medicine,food additives,isolating agent ect.
