CALCIUM CARBONATE

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Product Name: CALCIUM CARBONATE
CAS No.: 1317-65-3
Chemical Name: CALCIUM CARBONATE
Synonyms: CALCITE;CHALK;ARAGONITE;GROUND LIMESTONE;PRECIPITATED CHALK;WHITING;Agstone;KALKSPAR;domolite;franklin
CBNumber: CB2356871
Molecular Formula: CCaO3
Formula Weight: 100.09
MOL File: 1317-65-3.mol

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CALCIUM CARBONATE Property

Melting point:: 825 °C
Boiling point:: 2850 °C
Density: 2.93 g/mL at 25 °C(lit.)
solubility: 5 M HCl: 0.1 M at 20 °C, clear, colorless
form: random crystals
color: Gray
Solubility Product Constant (Ksp): pKsp: 8.47
CAS DataBase Reference: 1317-65-3(CAS DataBase Reference)
EPA Substance Registry System: Limestone (1317-65-3)

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Safety

Hazard Codes: Xi
Risk Statements: 37/38-41
Safety Statements: 26-36/37/39
OEB: B
OEL: TWA: 10 mg/m3 (total)
WGK Germany: -
RTECS: FF9335000

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H315Causes skin irritation

H318Causes serious eye damage

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P310Immediately call a POISON CENTER or doctor/physician.

P321Specific treatment (see … on this label).

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P362Take off contaminated clothing and wash before reuse.

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CALCIUM CARBONATE Chemical Properties,Usage,Production

Description

Calcite is one of the most common minerals on the face of the earth, comprising about 4% by weight of the earth’s crust and is formed in many different geological environments. Calcite can form rocks of considerable mass and constitutes a significant part of all three major rock classification types. It forms oolitic, fossiliferous and massive limestones in sedimentary environments and even serves as the internal cement for many sandstones and shales.Calcite is even a major component in the igneous rock called carbonatite and forms the major portion of many hydrothermal veins. Not necessarily a variety of calcite, cave formations are certainly a unique aspect of calcite’s story.

Chemical Properties

Calcium carbonate is a white, odorless powder, or crystalline solid.

Chemical Properties

Ground limestone consists essentially of calcium carbonate. It is obtained by crushing, grinding, and classifying naturally occurring limestone benefited by flotation and/or air classification. It is pro duced as a fine, white to off-white, microcrystalline powder. It is odorless and tasteless and is stable in air. It is practically insoluble in water and in alcohol. The presence of any ammonium salt or carbon dioxide increases its solubility in water, but the presence of any alkali hydroxide reduces the solubility.

Uses

Manufacture of quicklime, Portland cement, and paints. United States Pharmacopeia (USP) grades are used in dentifrices, cosmetics, food, and pharmaceuticals such as antacids.

Uses

Source of lime; neutralizing agent, filler, and extender in rubber, plastics, paints; opacifying agent in paper; fortification of bread; putty; tooth pow- ders; antacid; whitewash; Portland cement; sulfur dioxide removal from stack gases; metallurgical flux; analytical chemistry; carbon dioxide gener- ation (laboratory).

Uses

Calcite is the primary mineral component in cave formations. Stalactites and stalagmites, cave veils, cave pearls, “soda straws” and the many other different cave formations that millions of visitors to underground caverns enjoy are made of calcite.

Preparation

The calcite present is derived mostly from the remains of organisms such as clams, brachiopods, bryozoa, crinoids and corals. These animals live on the bottom of the sea and when they die their shells accumulate into piles of shelly debris. This debris can then form beds of limestone. Some limestones may have been derived from nonbiogenic calcite formation.

Definition

Aragonite: An anhydrous mineral form of calcium carbonate, CaCO₃, which occurs associated with limestone and in some metamorphic rocks. It is also the main ingredient of pearls. It is not as stable as calcite, into which it may change over time.
Calcite:A mineral form of calcium carbonate occurring in limestone, chalk, and marble.
Charlk: A natural form of calcium carbonate (CaCO₃) formed originally by marine organisms. (Blackboard chalk is calcium sulfate, CaSO₄.).

General Description

Odorless, white to tan powder.

Reactivity Profile

CALCIUM CARBONATE has generally low chemical reactivity. Is non-combustible. Decomposes at high temperature (825°C) to give gaseous carbon dioxide and calcium oxide (quicklime). Incompatible with acids, alum, ammonium salts, fluorine, magnesium. Reacts with acids and acidic salts to generate gaseous carbon dioxide with effervescence (bubbling). The reaction is rapid and exothermic with concentrated solutions of acids. The efferversence can create extensive foaming. Ignites on contact with fluorine.

Hazard

A nuisance particulate dust.

Health Hazard

Calcium carbonate is considered to be a nuisance dust.
Although no adverse effects have been reported in the literature among workers exposed to calcium carbonate, high concentrations of the dust would be expected to act as a physical irritant to the eyes and skin.1 Fourteen British workers exposed to heavy calcium carbonate concentrations for 12–35 years showed no trace abnormalities due to dust or any clinical sign of pneumoconiosis or chronic bronchitis on X ray.2 Long exposure to high dust concentrations of pure calcium carbonate (quartz content less than 1.1%) did not result in lung fibrosis.

Agricultural Uses

Limestone or dolomite, used in agriculture for liming the soil, is ground to a fineness to ensure that 50% of the particles pass through a 1.70mm Indian Standards (IS) sieve, and 50% is retained on a 150micron IS sieve.

Safety Profile

A nuisance dust. An eye and skin irritant. Igmtes on contact with F2. Incompatible with acids, ammonium salts, (Mg + H2). Calcium carbonate is a common air contaminant. See also CALCIUM COMPOUNDS.

Potential Exposure

Calcium carbonate is used as a source of lime; neutralizing agent; manufacturing or rubber, plastics, paint and coatings; sealants, paper, dentifrices, ceramics, putty, polishes and cleaners, insecticides, inks and cosmetics; whitewash; Portland cement; antacids; analytical chemistry, and others

Incompatibilities

Calcium carbonate decomposes in high temperature forming carbon dioxide and corrosive materials

Waste Disposal

Landfills. It is the responsibility of chemical waste generators to determine if a discarded chemical is classified as a hazardous waste. See 40 CFR Parts 261.3 for United States Environmental Protection Agency guidelines for the classification determination. In addition, in order to ensure complete and accurate classification, waste generators must consult state and local hazardous waste regulations.

CALCIUM CARBONATE Preparation Products And Raw materials

Raw materials

2 DIESEL FUEL

Preparation Products

Regulus silicate cement Artinite Sodium tetraborate decahydrate ammonia synthesis Fe catalysts Dicyandiamide Barium carbonate Calcium carbonate Sodium dichromate dihydrate (+/-)-NICOTINE Calcium oxide Diantimony trioxide Calcium chloride Zinc oxide calcium magnesium phosphate(CMP) Silicon Carbon dioxide Lithium carbonate Talc Calcium carbide AMMONIA SYNTHESIS CATALYST Calcium chloride dihydrate Lithium hydroxide monohydrate Calcium phosphate dibasic Calcium nitrite Cement dust CALCIUM SULFATE Sodium bicarbonate Sodium hydroxide Fiber Glass Wool Calcium acetate 1,2,4-Trichlorobenzene Calcium hypochlorite Calcium chloride hexahydrate Aluminum hydroxide Calcium phosphate dibasic dihydrate Calcium hydroxide Aluminum oxide Sodium carbonate SODA ASH LIGHT 99.2% MIN.

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View Lastest Price from CALCIUM CARBONATE manufacturers

Shaanxi Dideu Medichem Co. Ltd

Product: CALCIUM CARBONATE 1317-65-3
Price: US $0.00-0.00/KG
Min. Order: 1KG
Purity: 99.0%
Supply Ability: 10000KG
Release date: 2024-09-04

1317-65-3, CALCIUM CARBONATERelated Search:

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