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By certification 
Technical parameters：
Item HX-SPT/SP
Appearance White Powder
Particle shape Cube
particle size（nm） 60-90
CaCO3 content（%） ≥95
Whiteness（%） ≥92
BET/Specific surface area（m²/g 24±2
Oil absorption value（gDop/100g CaCO3） 23±2
Moisture（%） ≤0.5
pH Value 8.5—9.5
Surface treatment Special fatty acid
Rate of activation ( % ) ≥96
Yield value Pa 100-200
Item HX-SPT/SP
Appearance White Powder
Particle shape Cube
particle size（nm） 60-90
CaCO3 content（%） ≥95
Whiteness（%） ≥92
BET/Specific surface area（m²/g 24±2
Oil absorption value（gDop/100g CaCO3） 23±2
Moisture（%） ≤0.5
pH Value 8.5—9.5
Surface treatment Special fatty acid
Rate of activation ( % ) ≥96
Yield value Pa 100-200