Content:
Physic-chemical properties: | Physic-chemical properties | High quality product | Class 1 product | Qualified product |
Whiteness(%) | ≥90 | ≥88 | ≥85 | |
Fineness,325 mesh (45μm) | ≥98 | |||
Moisture content(%) | ≤0.5 | |||
Iron salt | Does not display blue color instantly | |||
Soluble substance in water (%) | ≤0.1 | |||
Soluble substance in acid (%) | ≤3.0 | |||
Loss of ignition (1000°C)(%) | ≤6.5 | |||
As | ≤3×10-4 | |||
Pb | ≤20×10-4 | |||
Mount of fungus,one/g | <500 | |||
Moulds,one/g | <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. |