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| Product Name: |
talc powder
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| Supply Ability: |
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| Related proudcts |
powder, talc, |
| Specifications |
20/25kg/bag |
| Price Term: |
CIF/FOB |
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Talc is termed in chemistry hydrated magnesium silicate with the chemical formula 3MgO&©|8226;4SiO2&©|8226;H2O[Mg3Si4O10£¨OH£©2],Theoretically the pure talc is 63.47 percent SiO2, 31.68 percent MgO, and 4.75 percent H2O and its crystal structure is platy, leafy, acicular or bulky. Pure talc sheet is composed of a layer of magnesium-oxygen/hydroxyl octahedra, sandwiched between two layers of silicon-oxygen tetrahedral, the three being superimposed and interlinked by weak van der Waals forces. The main or basal surfaces of this elementary sheet do not contain hydroxyl groups or active ions, which explains talc's hydrophobicity and inertness.
Talc is neither conductive nor flammable and practically insoluble in water, weak acids or alkalis. Although it has very little chemical reactivity, talc does have a marked affinity for certain organic chemicals, i.e. it is organophilic and hydrophobic. The melting point if talc is at 1557℃. Between 700 to 900℃, it loses its hydroxyl groups (structural water) progressively.
The crystal habit of talc is commonly foliated to fibrous masses, with a Mohs scale of hardness of 1 and density of 2.75, having a distinctly greasy feel and its color ranges from white to grey or green.
WE supply chemical grade /pharmaceutical grade /food grade /paper grade
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| Company: |
Shenyang Midas Imp. & Exp. Co., Ltd.
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| Contact: |
Ms. cindy hu |
| Address: |
qingnian street 168 |
| Postcode: |
110000 |
| Tel: |
86 24 24164178 8611 |
| Fax: |
86 24 24110198 |
| E-mail: |
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