Calcium carbonate

Calcium carbonate (CaCO?) is an inorganic compound, commonly known as limestone, limestone, stone powder, marble, etc. Calcium carbonate is neutral, basically insoluble in water, but soluble in hydrochloric acid. It is one of the common substances on the earth. It exists in aragonite, calcite, chalk, limestone, marble, travertine and other rocks. It is also the main component of animal bones or shells. Calcium carbonate is also an important building material and has a wide range of industrial uses.

【Basic Information】

Chinese name: calcium carbonate

English name: Calcium carbonate

Chinese alias: C.I. Pigment White 18; precipitated calcium carbonate; chalk powder; large white powder; light calcium carbonate; calcium carbonate; light calcium; active calcium carbonate; calcite; heavy calcium carbonate

English alias: C.I. 77220; C.I. Pigment White 18; Calcium carbonate [USAN]; Chalk; Weightily Calcium Carbonate; Calcium Carbonate Light; Calcium Carbonate Heavy; Biological Calcium Carbonate; Oyster Shell Powder

CAS Number: 471-34-1

Storage method

1. Food grade plastic bag outer woven bag packaging.

2. Store in a cool, dry and ventilated place.

3. Do not store with poisonous chemicals and liquid acids. Pay attention to moisture.

【The main purpose】

1. Light calcium carbonate can be used as leavening agent, flour treatment agent, anticaking agent, acidity regulator, nutrition enhancer, curing agent, etc. According to my country's regulations, it can be used for various foods and gum bases that need to add expanders, according to GMP. It can also be used as a flour improver, the maximum usage is 0.03%; milk powder 7.5～18g/kg; soy milk powder, soybean powder 4～20g/kg; soft drinks 0.4～3.4g/kg; lotus root flour 6～8g/kg; instant breakfast Cereal products 2～7g/kg. FDA (184.1192, 2000) does not make restrictive regulations, according to GMP. When this product is used as a leavening agent, it is often used in conjunction with other varieties. The leavening agent compounded with sodium bicarbonate, alum, etc., will slowly release carbon dioxide when heated, so that the food produces a uniform and delicate leavening body. It can improve the quality of pastries, breads and biscuits. In addition, it also strengthens calcium. The smaller the calcium carbonate particles, the easier it is to absorb. In Japan, light calcium carbonate is used as a leavening agent, and the amount used in general food is 1%.

2. Used as a feed nutrition enhancer.

3. Calcium carbonate whisker is one of the earliest used and most used fillers in rubber industry and plastic industry. In the rubber industry, it is widely used in hoses, rubber sheets, rubber cloth, rubber shoes and medical products, and is a good filler for reducing product costs. In the plastics industry, it is mainly used for soft polyvinyl chloride composites, plastisols and glass fiber reinforced polyester composites, such as wire sheaths, artificial leather and other extruded and rolled products. The general dosage is about 20 parts. There are also a large number of applications in calcium plastic materials, such as rigid PVC pipes and plates. In addition, this product is also widely used in papermaking, coating, ink industry and daily chemical products.

4. Compared with general granular calcium carbonate, calcium carbonate whiskers show significant strengthening and toughening effects. Calcium carbonate whiskers can be used to reinforce plastics and rubber. For example, it can be used as a reinforcing modifier for polyamide, polycarbonate, thermoplastic polyester, ABS, PP and other resins, while reducing costs, it can also improve the bending strength, dimensional stability, and thermal stability of the product. Used as high-grade paper filler in the paper industry, this paper can be used as a flame-retardant paper for interior decoration and other aspects. Calcium carbonate whisker is non-toxic and is an ideal substitute for asbestos. It can be used as a friction material instead of asbestos to manufacture friction materials such as automobiles brake pads.

5. It is a rubber filler, which can make the rubber bright in color, high elongation, high tensile strength and good wear resistance. It is also used as a filler in industries such as artificial leather, wire, polyvinyl chloride, paint, ink, and paper. When used in the production of microporous rubber, it can be foamed uniformly.

6. Used as an analytical reagent, such as a reference reagent. Sample flux and volatile additives in emission spectrum analysis. It is also used as silicon single crystal dicing glue, thick film capacitor material, optical glass and raw material for pharmaceutical industry.

7. Used as a white filler for plastics, paper, rubber, coatings, inks, etc., it is one of the most widely used fillers. Its price is low, the source is wide, the relative density is small, in addition to the incremental effect, it can also improve the processing performance and product performance. In the manufacture of adhesives, it can be used as a filler for epoxy glue, nylon sealant, neoprene sealant, etc. In some soft polyvinyl chlorides, it has a heat stabilizing effect, which can reduce the amount of heat stabilizer. Used as a viscosity regulator for PVC paste. Used for wire wrapping, artificial leather, etc. can improve the color stability of products. In the daily chemical industry, it is used as a raw material for manufacturing toothpaste and tooth powder. In medicine, it is used as an antacid for gastric and duodenal ulcer and an antidote for acidosis. In agriculture, it is used as feed additive and antibacterial agent for dairy cows. Used in industrial waste gas treatment to remove SO2 from sulfur-containing waste gas. Used as a neutralizer and flocculant for industrial wastewater in water treatment. Used as an anti-sticking agent in the production of linoleum felt. It is used to eliminate sourness in wine brewing, and it is also used as a filler for making matches, pencils, crayons, insulation materials, and welding rods.

8. It is used to make raw materials such as fragrant powder, pressed powder, gouache, rouge, etc. It is used as a flavor mixture when making powder cosmetics. It is also mainly used as a friction agent for toothpaste, which is a hard abrasive for toothpaste.