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471-34-1

471-34-1 Structure

471-34-1 Structure
IdentificationMore
[Name]

Calcium carbonate
[CAS]

471-34-1
[Synonyms]

ARAGONITE
CALCII CARBONAS
CALCITE
CALCIUM CARBONATE
CALCIUM CARBONATE, LIGHT
CALCIUM (II) CARBONATE
CARBONIC ACID CALCIUM SALT
CHALK
CHALK, PRECIPITATED
ENGLISH WHITE
FORMAXX(R) CALCIUM CARBONATE
GROUND LIMESTONE
ICELAND SPAR
KALKSPAR
LIME
LIMESTONE
MAGGRAN(R) CC
MAGGRAN(R) CCPLUS
MAGNESIA 84460
MAGNESIA 84470
[EINECS(EC#)]

207-439-9
[Molecular Formula]

CCaO3
[MDL Number]

MFCD00010906
[Molecular Weight]

100.09
[MOL File]

471-34-1.mol
Chemical PropertiesBack Directory
[Appearance]

White powder
[mp ]

825 °C
[density ]

2.93 g/mL at 25 °C(lit.)
[refractive index ]

1.6583
[storage temp. ]

Store at RT.
[solubility ]

5 M HCl: 0.1 M at 20 °C, clear, colorless
[form ]

random crystals
[Stability:]

Stable. Incompatible with acids, fluorine, ammonium salts, alum.
[Water Solubility ]

Insoluble
[Merck ]

14,1657
[Uses]

Calcium Carbonate is the calcium salt of carbonic acid which is used as an anticaking agent and dough strengthener. it is available in varying particle sizes ranging from coarse to fine powder. it is practically insoluble in water and alcohol, but the presence of any ammonium salt or carbon dioxide increases its solubility while the presence of any alkali hydroxide reduces its solubility. it has a ph of 9–9.5. it is the primary source of lime (calcium oxide) which is made by heating limestone in a furnace. calcium carbonate is used as a filler in baking powder, for calcium enrichment, as a mild buffering agent in doughs, as a source of calcium ions in dry mix desserts, and as a neutralizer in antacids. it is also termed limestone.
[Uses]

Made by adding soluble carbonate to a calcium salt solution. The white powder or crystals are soluble in acid but not in water. Calcium carbonate was used to neutralize gold toning baths and as a fine abrasive added to water and alcohol for cleaning glass plates before they were coated with photographic binders.
[CAS DataBase Reference]

471-34-1(CAS DataBase Reference)
[EPA Substance Registry System]

471-34-1(EPA Substance)
Safety DataBack Directory
[Hazard Codes ]

Xi
[Risk Statements ]

R37/38:Irritating to respiratory system and skin .
R41:Risk of serious damage to eyes.
R36/38:Irritating to eyes and skin .
R36:Irritating to the eyes.
[Safety Statements ]

S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S37/39:Wear suitable gloves and eye/face protection .
[WGK Germany ]

-
[RTECS ]

FF9335000
[HS Code ]

28365000
[Hazardous Substances Data]

471-34-1(Hazardous Substances Data)
Raw materials And Preparation ProductsBack Directory
[Raw materials]

Ammonium hydroxide-->Ammonium chloride -->CARBON DIOXIDE-->Calcium hydroxide -->Calcium oxide-->Paraffin wax-->CALCIUM CARBONATE-->METALLURGICAL COKE-->Talc-->SURFACTANT-->Coke (coal) -->Sulfonated castor oil-->Metatitanic acid-->Paste-->Hexanoyl chloride-->Sodium pyruvate-->Cyclone separator-->Sodium stearate-->Coupling agent-->Calcium-->Mini-efficient pulverizer-->Carbonization tower-->Air blower-->PartialFattyAcidEsterofGlycerine-->Jaw crusher-->HARD COKE-->Elevator
[Preparation Products]

bastnasite-->Calcium formate -->Calcium bromide-->Calcium nitrate-->Flour improver-->Acrylic latex paint for exterior wall-->9-Formyl-8-hydroxy-1,1,7,7-tetramethyljulolidine-->Styrene-acrylic latex paint for exterior wall-->Acrylic latex paint for interior wall-->N-(4,6-DIMETHYLPYRIMIDIN-2-YL)BENZENE-1,4-DIAMINE-->4-(3-BROMOPHENYL)MORPHOLINE-->latex paint-->Strontium sulfate-->Sodium 2-naphthalenesulfonate-->Polymyxin B, N-sulfomethyl deriv., sodium salt -->1,2,4-Butanetriol-->D-Cycloserine-->FUCHSIN BASIC-->Acid Orange 33-->Chrom-tin-Pink Stannite Pigment-->DL-Malic acid-->Plastic products-->Interior wall coating-->Direct Black 38-->2-NAPHTHYLAMINE-4,6,8-TRISULFONIC ACID-->Calcium citrate-->Calcium dipropionate-->FORTIMICIN-->Calcium nitrate tetrahydrate-->2-hydroxy-4-methylbenzenesulphonic acid -->Disperse Yellow Se-Fl-->Toothpaste-->1-HYDROXY-2-BUTANONE-->calcium bis(2-(1-carboxylatoethoxy)-1-methyl-2-oxoethyl) distearate-->1,3-Diphenylacetone-->CALCIUM SILICATE-->4,4`-di(a-methylbenzyl)diphenylamine -->CALCIUM GLUCONATE MONOHYDRATE-->Calcium sorbate -->Polysulfide sealant
Material Safety Data Sheet(MSDS)Back Directory
[msds information]

Limestone(471-34-1).msds
Questions and Answers (Q&A)Back Directory
[Description]

Calcium carbonate occurs in nature as limestone in various forms, such as marble, chalk, and coral. It is probably the most widely-used raw material in the chemical industry. It has numerous applications, primarily to produce cement, mortars, plasters, refractories, and glass as building materials. It also is used to produce quicklime, hydrated lime and a number of calcium compounds. It is produced either as powdered or precipitated calcium carbonate. The latter consists of finer particles of greater purity and more uniform size. They also have many important commercial applications. Various grades of precipitated calcium carbonate are used in several products, such as textiles, papers, paints, plastics, adhesives, sealants, and cosmetics.
[Chemical Properties]

Calcium carbonate occurs in two forms—hexagonal crystal known as calcite, and orthorhombic form, aragonite. Calcite decomposes on heating at 825°C, aragonite melts at 1,339°C (at 102.5 atm). Density 2.71 g/cm3 (calcite), 2.83 g/cm3 (aragonite); insoluble in water (15mg/L at 25°C); Ksp 4.8x10–9 ; soluble in dilute mineral acids.
[Production Methods]

Calcium carbonate is obtained from natural limestone deposits. The purified compound, known as precipitated calcium carbonate, is synthesized from limestone. Limestone is calcined to calcium oxide and carbon dioxide in a kiln. The products are recombined after purification. Calcium oxide is hydrated  with water to give a slurry called milk of lime, which is then carbonated by bubbling CO2 through it. The reactions involved in the process are as follows:
CaCO3 CaO + CO2
CaO + H2O Ca(OH)2
Ca(OH)2+ CO2→CaCO3+ H2O
The crystal sizes required for various commercial applications may be controlled by temperature, pH, concentrations, and mixing rate.
Calcium carbonate also may be precipitated by mixing solutions of calcium chloride and sodium carbonate.
[Reactions]

Calcium carbonate decomposes to calcium oxide and CO2 on heating. Treatment with dilute mineral acids produces corresponding calcium salts with liberation of CO2:
CaCO3+ 2HCl →CaCl2+ H2O + CO2
In the presence of CO2 it dissolves in water with the formation of bicarbonate:
CaCO3+ H2O + CO2→Ca2++ 2HCO3 ¯
It is reduced to calcium carbide when heated with coke or anthracite in an electric furnace:
2CaCO3+ 5C→(high temperature)→2CaC2+ 3CO2
Questions And AnswerBack Directory
[Uses]

Calcium carbonate (CaCO3) can be in the form of an odorless crystal or powder and is one of calcium’s most stable compounds, better known in its natural state as limestone, marble, chalk, calcite, oyster shells, and the minerals marl and travertine. Calcium carbonate is the source of lime and is used as a “filler” for many products, including paints, plastics, and foods (bread), and as an antacid.
Spectrum DetailBack Directory
[Spectrum Detail]

Calcium carbonate(471-34-1) IR1
Well-known Reagent Company Product InformationBack Directory
[Acros Organics]

Calcium carbonate, heavy powder, pure, 98+%(471-34-1)
[Alfa Aesar]

Calcium carbonate, Puratronic, 99.997% (metals basis)(471-34-1)
[Sigma Aldrich]

471-34-1(sigmaaldrich)
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