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 |
CAS | 471-34-1 13397-25-6 1317-65-3 |
EINECS | 207-439-9 |
InChI | InChI=1/CH2O3.Ca.2H/c2-1(3)4;;;/h(H2,2,3,4);;;/p-2/rCH2O3.CaH2/c2-1(3)4;/h(H2,2,3,4);1H2/p-2 |
InChIKey | VTYYLEPIZMXCLO-UHFFFAOYSA-L |
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. |
Hazard Symbols | Xi - Irritant |
Risk Codes | 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 Description | 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 S37 - Wear suitable gloves. |
UN IDs | N/A |
WGK Germany | - |
RTECS | FF9335000 |
TSCA | Yes |
HS Code | 28365000 |
Toxicity | LD50 orally in Rabbit: 6450 mg/kg LD50 dermal Rat > 2000 mg/kg |
Raw Materials | Ammonium chloride Calcium carbonate |
Downstream Products | Calcium perphosphate,ammonified,granular Calcium Formate |
white crystalline powder. Odorless and tasteless. There are two kinds of crystals, one is the orthogonal crystal aragonite. d 2. 83, melting point 825 ℃ (decomposition), decomposition of calcium oxide and carbon dioxide. One is the hexagonal rhombohedral crystal calcite, d25.2 711, melting point 1339 ℃(10. 39MPa). Practically insoluble in water, soluble in acid.
calcium hydroxide reacts with hydrochloric acid to obtain calcium chloride, which is decolorized by activated carbon and filtered to remove impurities, so that calcium chloride is carbonized with carbon dioxide in the presence of ammonia water to obtain calcium carbonate, which is then crystallized, separated, washed, dehydration, drying to obtain pure calcium carbonate.
reagents for the assay and determination of halogens in organic synthesis reactions and for the assay of phosphorus. Used for silicon single crystal chip glue, thick film capacitor material and manufacturing optical neodymium glass raw material.
rat oral LDso:6450mg/kg. It has a strong stimulating effect on the eyes and a moderate stimulating effect on the skin. Store in a cool, ventilated warehouse. Should be stored separately from acids, ammonium salts, etc. No impact, tumbling or falling during handling. Attention should be paid to personal protection in sub-packing and handling operations.