Monoclinic crystal system, usually in leaf shape, scale shape, granular, fibrous aggregate or dense block shape. The colors are white, light green, light gray, light yellow, and light brown.
Talc is a water-containing layered silicate mineral, its chemical formula is 3MgO•4SiO2•H2O. The weakly alkaline pH is 9.0-9.5, with good chemical stability, low hardness, lipophilic and hydrophobic properties, and is a rare functional filler. It can be widely used in papermaking, plastics, paint, ceramics, cosmetics, medicine, rubber, agricultural products, fertilizers and other industries. Especially in the plastic modification industry, the cost of products can be greatly reduced, and the impact toughness of plastics can be improved.
Molecular formula: 3MgO.4O2Si.H2O
Whiteness (%): ≥ 90%D97: 325Mesh HS code: 25262020 CAS No.: 14807-96-6
SpecificationApprance | White powder 200mesh-6000mesh |
SiO2 ≥ w% | 61 |
MgO ≥ w% | 30 |
Whiteness ≥ | 85-96 |
acid non-soluble substance w% | ≤1.5 |
loss on ignition | ≤6.0 |
hydrotrope w% | 0.1 |
Fineness(45um) | 98 |
AS | ≤3.0 |
Pb | ≤5.0 |
Dry ignition | ≤0.5 |
Application1. Widely used in ceramics, paint, papermaking, textiles, rubber, coatings, daily chemicals and other fields
2. Widely used in ceramics, paint, linoleum, papermaking, textiles, rubber, coatings, daily chemical industries, rubber, plastic products, paint, papermaking, etc. as a filler, and also the main raw material for talcum powder and prickly heat powder
3. Anti-caking agent; gum filler (the amount is 5% of the amount of polyvinyl acetate); filter aid; anti-sticking and release agent. GB2760-96 stipulates as processing aids and gum fillers, subject to GMP. Japan (1990) stipulates that the maximum residue in general food is 0.5%. Chewing gum 5%.
4. Used as a filler for rubber, plastics, paint, paper, cosmetics, a carrier for fertilizers, catalysts, drugs, and a diluted powder for pesticides, etc.
5. Usually suitable for use after bathing in summer. When applied to the skin, it can absorb sweat and moisture and has a good smooth feeling.