Calcium Carbonate
Calcium carbonate is a chemical compoond wi the formula CaCO3.
It is a common substance foond in rocks in aw pairts o the warld, an is the main component o shells o marine organisms, snails, coal balls, pairls, an eggshells. Calcium carbonate is the active ingredient in agricultural lime, an is creatit when Ca ions in haird watter react wi carbonate ions creatin limescale. It is commonly uised medicinally as a calcium supplement or as an antacid, but excessive consumption can be hazardous.
| |||
 | |||
| Names | |||
|---|---|---|---|
| IUPAC name Calcium carbonate | |||
| Ither names | |||
| Identifiers | |||
CAS Nummer | |||
3D model (JSmol) | |||
| ChEBI | |||
| ChEMBL | |||
| ChemSpider | |||
| EC Nummer | 207-439-9 | ||
| KEGG | |||
PubChem CID | |||
| RTECS nummer | FF9335000 | ||
| UNII | |||
| |||
SMILES
| |||
| Properties | |||
| CaCO3 | |||
| Molar mass | 100.0869 g/mol | ||
| Appearance | Fine white pouder; chalky taste | ||
| Odour | odorless | ||
| Density | 2.711 g/cm3 (calcite) 2.83 g/cm3 (aragonite) | ||
| Meltin pynt | 825 °C (aragonite) 1339 °C (calcite) | ||
| Bylin pynt | decomposes | ||
Solubility in watter | 0.0013 g/100 mL (25°C) | ||
| Solubility product, Ksp | 4.8×10−9 | ||
| Solubility in dilute acids | soluble | ||
| Acidity (pKa) | 9.0 | ||
| Refractive index (nD) | 1.59 | ||
| Structur | |||
| Trigonal | |||
| Space group | 32/m | ||
| Thermochemistry | |||
| Staundart molar entropy S | 93 J·mol−1·K−1 | ||
| Std enthalpy o formation ΔfH | −1207 kJ·mol−1 | ||
| Hazards | |||
| NFPA 704 |  0 1 0 | ||
| Flash pynt | 825 °C | ||
| Lethal dose or concentration (LD, LC): | |||
LD50 (Median dose) | 6450 mg/kg (oral, rat) | ||
| Relatit compoonds | |||
Ither anions | Calcium bicarbonate | ||
Ither cations | Magnesium carbonate Strontium carbonate Barium carbonate | ||
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa). | |||
 verify (whit is   ?) | |||
| Infobox references | |||
References
Freemit airtins
- Internaitional Chemical Safety Caird 1193
- PubChem 516889
- ATC codes: A02AC01 (WHO) an A12AA04 (WHO)
- The British Calcium Carbonate Association – What is calcium carbonate Archived 2008-05-24 at the Wayback Machine
- CDC - NIOSH Pocket Guide tae Chemical Hazards - Calcium Carbonate
This article uses material from the Wikipedia Scots article Calcium carbonate, which is released under the Creative Commons Attribution-ShareAlike 3.0 license ("CC BY-SA 3.0"); additional terms may apply (view authors). Content is available unner CC BY-SA 4.0 unless itherwise notit. Images, videos and audio are available under their respective licenses.
®Wikipedia is a registered trademark of the Wiki Foundation, Inc. Wiki Scots (DUHOCTRUNGQUOC.VN) is an independent company and has no affiliation with Wiki Foundation.