| CAS No.: | 471-34-1 |
|---|---|
| Formula: | CaCO3 |
| EINECS: | 207-439-9 |
| Color: | White |
| Appearance: | Odorless Tasteless White Powde, White Powder |
| Kind: | CaCO3 |
| Samples: |
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| Customization: |
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White powder, tasteless and odorless. There are two forms: amorphous and crystalline. The crystalline form can be divided into orthorhombic system and hexagonal system, which are columnar or rhombic. The relative density is 2.71. It decomposes at 825 ~ 896.6 ºC, the melting point is 1339 ºC, and the melting point is 1289 ºC under 10.7Mpa. Insoluble in water and alcohol. It dissolves in acid and emits carbon dioxide at the same time, showing an exothermic reaction. Also soluble in ammonium chloride solution. It is stable in the air and has slight moisture absorption ability. It has good covering power.Preparation methodCalcium hydroxide reacts with hydrochloric acid to obtain calcium chloride, which is decolorized by activated carbon and filtered to remove impurities. Calcium chloride is carbonized with carbon dioxide in the presence of ammonia to obtain calcium carbonate, which is then crystallized, separated, washed, dehydrated and dried to obtain pure calcium carbonate.Transportation and storageIt has strong irritant effect on eyes and moderate irritant effect on skin. Store in a cool and ventilated warehouse. It should be stored separately from acids, ammonium salts, etc. Do not hit, roll or fall during handling. Pay attention to personal protection during sub loading and handling.
Purpose1. Used for flour treatment agent, transport agent, stabilizer, yeast nutrients, mineral nutrition enhancer.
2. Used as nutrient fortifier for feed.
3. It is a filling material for rubber, which can make rubber bright color, high elongation, high tensile strength and good wear resistance. Also used as artificial leather, wire, PVC, paint, ink and paper industry filler. When used to produce microporous rubber, it can make it evenly foaming.
4. Used as an analytical reagent, as a reference reagent. Emission spectrum analysis of sample flux, volatile additives. Also used as silicon single crystal slicing glue, thick film capacitive material, optical glass and pharmaceutical industry raw materials.
5. As a white filler for plastics, paper, rubber, paint, ink, etc., it is one of the most widely used filler
6. Used for the manufacture of powder, powder, gouache, rouge and other raw materials, powder cosmetics used as a flavor mixing agent, but also mainly used for toothpaste as friction agent, toothpaste is a hard abrasive. For the preparation of cement, ceramics, lime, calcium salt, toothpaste, dyes, pigments, mineral water, artificial stone, putty,
neutralizers, catalysts, fillers, pharmaceuticals. it can be used as a filler in rubber, plastic, paper, putty, primer, coating
and ink industries. Widely used in organic synthesis, metallurgy, glass and asbestos production. It can also be used as a
neutralizing agent for industrial wastewater, an antacid agent for gastric and duodenal ulcer disease, an antidote for acidosis, a sulfur dioxide removing agent for sulfur dioxide in sulfur dioxide-containing waste gas, a dairy feed additive, and an anti-sticking agent for wool felt, etc. It can also be used as a raw material for tooth powder, toothpaste and other cosmetics.
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Item
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Standard
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Test results
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CaCO3
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98.0%-100.5%
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98.5%
|
|
HCl insoluble
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≤0.20%
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0.15%
|
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Free alkali
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Pass test
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Pass test
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Alkali metal and magnesium
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≤1.0%
|
0.85%
|
|
Ba
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≤0.030%
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0.02%
|
|
As
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≤0.0003%
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0.00025%
|
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Loss on drying
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≤2.0%
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1.45%
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F
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≤0.005%
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0.0035%
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Pb
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≤0.0003%
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0.00023%
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Hg
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≤0.0001%
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<0.0001%
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|
Cd
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≤0.0002%
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0.0001%
|
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