whiteness     (%)         92

partical size (-2μm):  PCT Min 95%

free acid(NaOH): PCT Max 0.55

 moisture (%): PCT Max 8

PH  4

specific surface area (m2/g)         285

density            (g/ml)           0.59

heavy metal （pb）(%): PCT Max 0.005

arsenic content(%):PCT Max 0.0005

 Active clay is an air-dry modeling material that is dense, durable and responsive. And it is a grey, pink or white solid powder, and specific gravity is 2.3-2.5. The active clay is mainly used as de-color absorbent in petrol-chemical, cooking oil, fat industry and animal fat fields.