|Properties||Unit||Typical Value||Testing Standard|
|Specific surface area(BET)||m2/g||140±20||GB/T 20020|
|pH in 4% dispersion||—||5.0～8.0||GB/T 20020|
|Loss on drying(2 hour at 105℃)||%||≤0.7||GB/T 20020|
|Loss on ignition(2 hour at 1000℃, based on material dried for 2 hours at 105℃)||%||≤2.0||GB/T 20020|
|Silica content( based on ignited material)||%||≥99.8||GB/T 20020|
|Tamped density(based on material dried for 2 hours at 105℃)||g/L||40～60||GB/T 20020|
|Carbon content（based on material dried for 2 hours at 105℃）||%||0.7～1.3||GB/T 20020|
Uses and Applications
Reinforcing filler in elastomers
Rheology control and thixotropic agent
Anti-settling,anti-sagging, and thickening agent
Free flow aid and anti-caking aid for powders
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