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Talc Powder Specification:
Talc is Hydrated Magnesium Silicate, it is a versatile material, also know as steatite or soapstone with the chemical formulation of Mg3 Si4 O10 (OH)2.
Specification | Super | High | Standard |
whiteness ≥(%) | 90 | 88 | 76 |
(Calcine whiteness)≥(%) | 91 | 90 | 88 |
(SiO2)≥(%) | 61 | 60 | 57 |
(MgO)≥(%) | 30 | 30 | 30 |
(Al2O3)≤(%) | 0.5 | 0.6 | 0.8 |
(CaO)≤(%) | 0.5 | 0.5 | 0.5 |
(Fe2O3)≤(%) | 0.3 | 0.4 | 0.5 |
Loi≤(%) | 6 | 7 | 10 |
Passing through | 45(um)99% | 45(um)98% | 45(um)98% |
Note: Special requirements should be decided through negotiation between the seller and the buyer.
Usage: Mainly used for plastic, rubber, EVA, cable, paper, cosmetics, food, pharmaceutical and ceramics.
Item / Parameter | Standard Value | Actual Value |
Whiteness % | ≥90.0 | 93.40 |
Fineness 325mesh (45μm) % | ≥98.0 | 98.62 |
Bulk Density Loose | 0.43-0.45g/cm3 | 0.44 |
Bulk Density Dense | 0.78-0.85g/cm3 | 0.78 |
SiO2 % | ≥60.0 | 61.85 |
MgO2 % | ≥30.0 | 31.34 |
CaO2 % | ≤1.0 | 0.68 |
Acid-Soluble Substance % | ≤3.0 | 1.96 |
Water Soluble Substance % | ≤0.10 | 0.06 |
Water Soluble Iron | Negative | Negative |
Moisture % | ≤0.15 | 0.04 |
PH Value | ≤8.5 | 8.10 |
Loss on Ignition (1075°C) % +25°C | ≤6.0 | 5.49 |
Arsenic | ≤2ppm | ≤2ppm |
Lead (As Pb) | ≤10ppm | ≤10ppm |
Total Number of Bacteria | ≤500cfu/g | 140cfu/g |
Asbestos Minerals | Nil | Nil |
