Activated Clay Desiccants Principle They appear as tough globose granules. After filtered from Attapulgite mine, ground-granulated-activated under high temperature, innoxious, harmless and degradable. The ability of moisture absorption is 3 times as silica gel. The heavy metal content is lower than ROHS and Sony GP. Applicable Scope Suitable for dehumidification of computer related products, sophisticated machinery, semiconductor industry and food industry. Criteria Meets international standard specifications such as the MIL-D-3464E (USA), JIS Z 0701 (Japan) and DIN 55473 (Germany) Material RH=20% ≥10.6-12.5 RH=40% ≥25.6-29.5 RH=90% ≥40.8-42.3 Pressure resistance N≥ 68 Abrasion Rate %≤ 5 Grain diameter mm 2.0-4.0 Loss on Drying (%) at 140 ℃ 2.0 MAX PH value 6.8 Apparent Density(g/ml) 0.78 Chemical Parameter Chemical elements Analysis Clay SiO2 (wt%) 68.8 Fe2O3(wt%) 1.38 Al2O3(wt%) 17.21 CaO(wt%) 2.76 Na2O(wt%) 1.12 Specification: 2~~1500g