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Item | Unit | Standard | Test method |
Appearance | White powder | HG/T 3063 | |
Loss on drying | % | 4.0-8.0 | HG/T 3065 |
Loss on ignition | % | ≤6.0 | HG/T 3066 |
PHvalue | - | 6.5-7.0 | HG/T 3067 |
Fe content | mg/kg | ≤120 | HG/T 3070 |
DBP oil absorption | cm3/g | 2.20-3.00 | HG/T 3072 |
BET surface area | m2/g | 140-190 | GB/T 10722-2014 |
Soluble salt | % | ≤1.0 | HG/T 3748 |
Average particle sizeD50 | μm | 12±2 | GB/T 32698-2016 |










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