CAS 1305-62-0 Calcium Hydroxide - Materials / Alfa Chemistry

NAVIGATION

Calcium Hydroxide

PRICE INQUIRY

Catalog Number

ACM1305620

CAS Number

1305-62-0

Product Name

Calcium Hydroxide

Structure

Category

Electrolytes; Ceramic Materials

Synonyms

Calcium dihydoxide

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.]

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

Color/Form

Crystals or soft granules or powder;Soft, hexagonal crystals;Rhombic, trigonal, colorless crystals;Soft, white crystalline powder;White powder [Note: Readily absorbs CO2 from the air to form calcium carbonate]

Complexity

Covalently-Bonded Unit Count

EC Number

215-137-3

Exact Mass

73.968

Formal Charge

Hazard Statements

Xi:Irritant

Heavy Atom Count

ICSC Number

0408

MDL Number

MFCD00010901

MeSH Entry Terms

Calcium Hydroxide;Hydroxide, Calcium

Monoisotopic Mass

73.968

Odor

Odorless

Other Experimental

Loses water when ignited to form calcium oxide; forms CaO;Loses water at 580 °C;Solubility in water is decreased by the presence of fixed alkali hydroxides.;Bulk density: 450 to 640 kg/cu m. In the as-poured state, it can be as low as 350 kg/cu m, owing to air entrapment;Lime salts, ... are various calcium containing compounds having the property of being corrosive to ... metals. /Lime salts, ... (corrosive solid, nos)/;Readily absorbs carbon dioxide from the air, forming CaCO3;Heat of formation = -6.1078X10+08 J/kmol

Refractive Index

Index of refraction: 1.574 (alpha), 1.545 (beta)

Rotatable Bond Count

RTECS Number

EW2800000

Safety Description

S26-S39

Stability

Readily absorbs carbon dioxide from air forming calcium carbonate.

UNII

PF5DZW74VN

Vapor Pressure