property: this product is innocuous, tasteless, odorless, and present in white fine sand .it can keep its character and intensity after the water absorption. it can not be dissolved in water and organic solvent but can be dissolved in strong acid and alkali at the high temperature. this product has temperate porosity volume、specific surface and activity. beside, it has good permeability for water and air
main usage: this product is a kind of extract for the extraction of chinese drugs. it is usually used for decoloration and chromatography in the production of chinese drugs. it dose not generate harmful substance to pollute the production. beside, this product is also used in the chromatography and drying technology.
specification
indexmodel    al2o3(%)≥    sio2(%)≤    fe2o3(%)≤    na2o(%)≤    l.o.i（%）≤    ph    activity    particle size%(mesh)
                                +80≤    +150≥
zb    99.0    0.02    0.015    0.30    5.0    7.0±0.5    ⅱ    30    85
the particle size can be adjusted to meet the customer’s different need.