Physicochemical properties
Density: 2.93 g/mL at 25 °C(lit.)
Boiling point: 333.6ºC at 760mmHg
Melting point: 825 °C
Molecular formula: CCaO3
Molecular weight: 102.103
Flash point: 197ºC
Exact quality: 101.962982
PSA: 63.19000
Appearance traits: white or colorless crystals or white powder or large pieces
Refractive index: 1.6583
Storage conditions:
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.
Stability:
1. Light calcium carbonate: amorphous powder, tasteless and odorless. Slightly hygroscopic, stable in dry air, and decomposes in acid. Heavy calcium carbonate: white powder, odorless and tasteless. Stable in the air. Almost insoluble water, slightly soluble in water containing ammonium salt or iron trioxide. When it meets with dilute acetic acid, dilute hydrochloric acid, etc., it will boil and dissolve. When heated, it will release carbon dioxide and generate calcium oxide. Its activity is greater than that of ordinary calcium carbonate, and it has strengthening properties. Activated calcium carbonate: easy to disperse in the rubber, can improve the reinforcement. Calcium carbonate is divided into light calcium carbonate, heavy calcium carbonate and colloidal calcium carbonate. The particle size of light calcium carbonate is about 5μm.
2. Calcium carbonate whiskers belong to aragonite structure, white powder. Needle-shaped or fibrous single crystals. It is a fibrous substance with good dispersibility and uniform size. The aspect ratio of the whiskers is 20-30, and the melting point is 759°C. High strength, good heat insulation performance, and good compatibility with resin.
3. Calcium carbonate has three isoforms: calcite, aragonite and vaterite. Natural limestone is almost entirely calcite. The chemical method is a colorless crystalline powder, which is almost insoluble in water.
Use:
【Use One】
Used to make cement, ceramics, lime, calcium salt, toothpaste, dyes, pigments, mineral water, artificial stone, putty, neutralizer, catalyst, filler, pharmaceuticals, etc.
【Use Two】
Used as a filler for plastics, rubber, and coatings
【Use Three】
Used in the production of anhydrous calcium chloride, sodium dichromate, glass, cement, building materials, etc.
【Use four】
Can replace part of semi-reinforcing carbon black as rubber reinforcing agent, and also used in paper, plastic, paint, etc.
【Usage Five】
It is mainly used as a filler in rubber, plastic, paper, coating, ink and other industries, and can be used in daily chemical products such as tooth powder, toothpaste, cosmetics, etc.
【Use Six】
Used as filler, extender, and reinforcing agent in rubber, plastic, ink, paint, coating, papermaking and daily chemical industries
【Use Seven】
Used for papermaking, water-soluble latex paint, plastic filling modification, etc.
【Usage Eight】
Filler for rubber, wire, artificial leather, paint, ink, paper, etc.
China
