Chemical Additives

Molecular Formula: CaCO3

Molecular Weight: 100.09

CAS No.: 471-34-1

Name	Calcium carbonate
Synonyms	Chalk akadama albacar albafil albaglos aeromatt Limestone C.I. 77220 albacar5970 PARIS WHITE Calcium carbonate PRECIPITATED CHALK Oyster Shell Powder C.I. Pigment White 18 Calcium Carbonate Light Calcium Carbonate Heavy Weightily Calcium Carbonate Biological Calcium Carbonate

Physico-chemical Properties

Molecular Formula	CCaO3
Molar Mass	100.0869
Density	2.93 g/mL at 25 °C (lit.)
Melting Point	825 °C
Boling Point	800 °C
Water Solubility	Insoluble
Solubility	5 M HCl: 0.1M at20°C, clear, colorless
Appearance	White powder
Specific Gravity	2.93
Color	White-beige to slightly beige-gray
Odor	Odorless
Exposure Limit	NIOSH: TWA 10 mg/m3; TWA 5 mg/m3
Solubility Product Constant(Ksp)	pKsp: 8.54
Maximum wavelength(λmax)	[‘λ: 260 nm Amax: ≤0.09’, , ‘λ: 280 nm Amax: ≤0.06’]
Merck	14,1657
BRN	8008338
PH	9.91(1 mM solution);9.91(10 mM solution);9.91(100 mM solution);
Storage Condition	Store at +5°C to +30°C.
Stability	Stable. Incompatible with acids, fluorine, ammonium salts, alum.
Sensitive	Easily absorbing moisture
Refractive Index	1.6583
MDL	MFCD00010906
Physical and Chemical Properties	Appearance and properties: odorless, tasteless white powder or colorless crystals. melting point (℃): 825 (decomposition) boiling point (℃): No data relative density (water = 1): 2.70-2.95 solubility: insoluble in water, soluble in acid. white powder, tasteless, odorless. There are two kinds of morphology: stereotyped and crystalline. The crystal type can be divided into orthorhombic crystal system and hexagonal system, which is columnar or diamond-shaped. The relative density was 2.71. 825~896.6 degrees C decomposition, melting point of 1339 degrees C, 10.7MPa melting point of 1289. Difficult to dissolve in water and alcohol. Soluble in acid, while releasing carbon dioxide, exothermic reaction. Also soluble in ammonium chloride solution. Stable in air, with slight moisture absorption. Have better hiding power.
Use	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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