Calcium Hydroxide

Catalog	ACM1305620
CAS	1305-62-0
Structure
Category	Flocculant
Description	Calcium hydroxide is an odorless white granules. Sinks in water. (USCG, 1999);White powder;COLOURLESS CRYSTALS OR WHITE POWDER.;White, odorless powder.;White, odorless powder. [Note: Readily absorbs CO2 from the air to form calcium carbonate.]
Synonyms	Calcium dihydoxide
IUPAC Name	calcium dihydroxide
Molecular Weight	74.09
Molecular Formula	H2CaO2
Canonical SMILES	[OH-].[OH-].[Ca+2]
InChI	InChI=1S/Ca.2H₂O/h;2*1H2/q+2;;/p-2
InChI Key	AXCZMVOFGPJBDE-UHFFFAOYSA-L
Boiling Point	2850 °C
Melting Point	580 °C
Flash Point	/Calcium Hydroxide is/ non flammable
Purity	99%+
Density	2.24 g/mL at 25 °C (lit.)
Solubility	0.2 % at 32° F (NIOSH, 2016);Slightly soluble in water. Insoluble in ethanol. Soluble in glycerol;In water, 1730 mg/L at 20 °C;In water, 0.160 g/100 g water at 20 °C;Very slightly soluble in boiling water. Insoluble in alcohol.;Soluble in acid;Soluble in glycerol, sugar or ammonium chloride solution; soluble in acids with evolution of much heat;Solubility in water: none;(32°F): 0.2%
Appearance	White solid
Application	Calcium hydroxide, also known as slaked lime or hydrated lime, is a versatile chemical compound with a wide range of applications. This white or nearly white crystalline or granular powder is formed by adding water to calcium oxide, a reaction that releases heat and is known as slaking. With limited water solubility and an alkaline pH of approximately 12.4 in aqueous solutions, calcium hydroxide serves multiple purposes. In food production, it is utilized to improve the dispersion of ingredients in various dishes and stabilize potassium iodide in iodized salt. The compound plays a crucial role in agriculture for neutralizing acidic soils and is used in manufacturing processes for products like mortar, whitewash, and glass. In the pharmaceutical industry, it acts as a pH adjuster in topical formulations and produces emulsions for certain ointments. In dentistry, it is prized for encouraging secondary dentine formation when used as a filling agent. Furthermore, calcium hydroxide finds utility in cosmetic and personal care products, such as hair straightening treatments and shaving preparations, underscoring its adaptability and widespread utility.
Storage	Store at +5 °C to +30 °C
EC Number	215-137-3
MDL Number	MFCD00010901
Refractive Index	Index of refraction: 1.574 (alpha), 1.545 (beta)
Stability	Readily absorbs carbon dioxide from air forming calcium carbonate.
Vapor Pressure	0 mm Hg (approx) (NIOSH, 2016);0 mmHg (approx);0 mmHg (approx)
WGK Germany	1

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