Active precipitated calcium carbonate

Our company's active precipitated calcium carbonate is produced according with HG/T2567-94 standard. The specifications are as the following:

Item	Index
	National industrial standard	Enterprise standard
Main content(based on CaCO3),% ≥	96.0	98.0
PH	8.0-10.5	8.0-9.0
Volatile matter below 105°C% ≤	0.50	0.20
Insoluble substance in hydrochloric acid % ≤	0.20	0.15
Residue on sieve 125µm test sieve ≤ 45µm test sieve ≤	0.010 0.30	0.010 0.15
Iron(Fe) % ≤	0.10	0.10
Manganese(Mn) % ≤	0.006	0.005
Whiteness.degree ≥	90.0	94.0
Oil absorption number % ≤	70	55.0
Activation grade % ≥	95	98