refining ability pct min 92
partical size (-2¦Ìm) pct min 95
free acid(NaOH) pct max 0.25
moisture pct max 9
PH 4
specific surface area 285 m2/g
density 0.59 g/ml
heavy metal(pb) pct max 0.005
arsenic content pct max 0.0005.
in 25kg pp bags.
