calcium hydroxide

Also known as slaked lime, Calcium hydrate, Caustic lime, Hydrated lime, Ca(OH)2, hydralime, builders' lime

chemical compound

AI overview

Calcium hydroxide is a white chemical compound made from calcium, hydrogen, and oxygen that has many practical uses in industry and construction. It matters because it's commonly used in applications like water treatment, cement production, and soil stabilization, making it an important material in modern infrastructure and environmental management.

AI-generated from the Wikipedia summary — may contain errors.

Chemical data

Formula: CaH2O2
Molecular weight: 74.09 g/mol
IUPAC name: calcium dihydroxide
SMILES: [OH-].[OH-].[Ca+2]
InChIKey: AXCZMVOFGPJBDE-UHFFFAOYSA-L
Polar surface area: 2 Å²
H-bond donors: 2
H-bond acceptors: 2
Formal charge: 0

via PubChem

Research

9,604 papers

Mechanisms of antimicrobial activity of calcium hydroxide: a critical review.ReviewInternational endodontic journal · 1999Siqueira JF Jr, Lopes HPDOI: 10.1046/j.1365-2591.1999.00275.x
Calcium Hydroxide.Journal of the American Dental Association (1939) · 2020Zinman EJDOI: 10.1016/j.adaj.2020.06.005
The Calcium Hydroxide Controversy: Does Calcium Hydroxide Weaken Teeth?ReviewDental traumatology : official publication of International Association for Dental Traumatology · 2025Kahler B, Swain MVDOI: 10.1111/edt.13015
Review of calcium hydroxide.ReviewInternational endodontic journal · 1990Foreman PC, Barnes IEDOI: 10.1111/j.1365-2591.1990.tb00108.x
Calcium hydroxide pastes: classification and clinical indications.ReviewInternational endodontic journal · 1999Fava LR, Saunders WPDOI: 10.1046/j.1365-2591.1999.00232.x
Calcium hydroxide-based root canal sealers: a review.ReviewJournal of endodontics · 2009Desai S, Chandler NDOI: 10.1016/j.joen.2008.11.026
[Calcium hydroxide-based pastes used in endodontics].ReviewRevue belge de medecine dentaire · 2003De Moor R
[Calcium hydroxide and apexification].ReviewRevista espanola de endodoncia · 1987Ruiz de Temiño Malo P, Kessler Nieto F, Morante Vadillo F

via PubMed

Wikidata facts

Mass: 73.968
Image: Calcium hydroxide.jpg

Show 10 more facts

canonical SMILES: [OH-].[OH-].[Ca+2]
NIOSH Pocket Guide ID: 0092
density: 2.24
decomposition point: 580
vapor pressure: 0
solubility: 0.2
time-weighted average exposure limit: 15
Commons category: Calcium hydroxide
chemical formula: CaH₂O₂
melting point: 44

Sources (5)

via Wikidata · CC0

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Article

Calcium hydroxide (traditionally called slaked lime) is an inorganic compound with the chemical formula Ca(OH)2. It is a colorless crystal or white powder and is produced when quicklime (calcium oxide) is mixed with water. Annually, approximately 125 million tons of calcium hydroxide are produced worldwide.

Calcium hydroxide has many names, including hydrated lime, caustic lime, builders' lime, slaked lime, cal, and pickling lime. Calcium hydroxide is used in many applications, including food preparation, where it has been identified as E number E526. Limewater and milk of lime are common names for a saturated solution of calcium hydroxide.