Slaked lime

Base Information

• Chemical Name: Slaked lime
• CAS No.: 1305-62-0
• Molecular Formula: Ca(OH)2
• Molecular Weight: 74.0927
• Hs Code.: 2825 90 19
• European Community (EC) Number: 215-137-3
• UNII: PF5DZW74VN
• Nikkaji Number: J43.728J
• Wikidata: Q182849
• ChEMBL ID: CHEMBL2106388
• Mol file: 1305-62-0.mol

Synonyms:Slaked lime;Hydrated lime;Lime hydrate;Lime water;Calcium hydroxide (Ca(OH)2);Slaked-lime;Calcarea caustica;Ca(OH)2;INS NO.526;CHEBI:31341;Calcium Oxide, Hydrated;E-526;calcium(II) hydroxide;Kalziumhydroxid;Loeschkalk;Kalsiumhydroksid;geloeschter Kalk;Hydroxyde de calcium;calcium(2+) hydroxide;Calcium hydroxide (ACN;CAH (CHRIS Code);CaH2O2;Calcium Hydroxide USP/FCC;LIME WATER [VANDF];Calcium hydroxide ACS grade;CALCIUM HYDROXIDE [II];CALCIUM HYDROXIDE [MI];Calcium hydroxide - Total dust;CALCIUM HYDROXIDE [FCC];CALCIUM HYDROXIDE [JAN];CALCAREA CAUSTICA [HPUS];CALCIUM HYDROXIDE [HSDB];CALCIUM HYDROXIDE [INCI];CHEMBL2106388;CALCIUM HYDROXIDE [VANDF];INS-526;AXCZMVOFGPJBDE-UHFFFAOYSA-L;CALCIUM HYDROXIDE [MART.];CALCIUM HYDROXIDE [USP-RS];CALCIUM HYDROXIDE [WHO-DD];AKOS015903965;Calcium hydroxide - Respirable fraction;CALCIUM HYDROXIDE [EP MONOGRAPH];CALCIUM HYDROXIDE [USP MONOGRAPH];FT-0623399;Q182849;J-005828

Chemical Property of Slaked lime

Chemical Property:

• Appearance/Colour: White powder
• Melting Point: 580 °C
• Boiling Point: 2850 °C
• PKA: 12.6[at 20 ℃]
• PSA: 40.46000
• Density: 2.24 g/cm³
• LogP: -0.35360
• Storage Temp.: Store at RT.
• Sensitive.: Air Sensitive
• Solubility.: 1.7g/l
• Water Solubility.: 1.65 g/L (20 ºC)
• Hydrogen Bond Donor Count: 2
• Hydrogen Bond Acceptor Count: 2
• Rotatable Bond Count: 0
• Exact Mass: 73.9680702
• Heavy Atom Count: 3
• Complexity: 0

Purity/Quality:

99% ^*data from raw suppliers

Calcium hydroxide ^*data from reagent suppliers

Safty Information:

• Pictogram(s): Xi,C
• Hazard Codes: Xi,C
• Statements: 41-34-37/38
• Safety Statements: 26-39-45-36/37/39-27

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Canonical SMILES: [OH-].[OH-].[Ca+2]
• Recent ClinicalTrials: Long-term Evaluation of Direct Pulp Capping
• Uses: 1. Calcium hydroxide Used for preparing bleaching powders, hard water softeners and the disinfecting and clarifying agents of tap water , as well as in building industry 2. Used for pharmacy. Used as rubber and oil industry additives. Used in lubricants for preventing coking, sludge deposition and anti-corrosion. Used as hard water softeners, disinfectants, antacids and so on. 3. Used as analytical reagents, carbon dioxide absorbents, as well as in organic synthesis 4. Used for making bleaching powder, hard water softener, depilatory, disinfectant, acid stop agent, astringent and various calcium salts. 5. Use for carbon dioxide examination and gas absorption. Used for leather hair removal, insecticide and water treatment. Calcium hydroxide, a weak base, has many diverse uses. Among the most important ones are:Flocculants; Paints And Sealants; Mortar; Portland Cement Mortar; Lime Plaster Other uses that have occurred in industry include: An alkali used as a lye substitute (NaOH) in no-lye hair relaxers. A chemical depilatory agent found in Nair . A calcium supplement in mineral fortified baby formulas. A chemical reagent used to form a long-lasting fungicide. In “reef-aquariums” for adding bio-available calcium in solution for calcium-using animals such as algae, snails, tube worms and corals and also to increase the alkalinity of the water. In the tanning industry for neutralization of acid, the liming of hides and skins and the flocculation of resultant wastewater. In the oil industry for the manufacture of oil additives (salicatic, sulphatic, fenatic). In the chemical industry for manufacture of calcium stearate. In the food industry for processing water (for alcoholic and soft drinks). Used in the separation of sugar from sugar cane in the sugar industry. Used in the processing of Norwegian “Lutefisk”. Dried cod fish is soaked in a mixture of slaked lime and soda to produce a soft-fleshed fish fillet that is steamed or baked and served with potato “Lefse”. In the manufacture of brake ? pads, ebonite and pesticides. In dentistry, it is used as dressing in paste form used for antimicrobial effect during a dental root canal procedure. Calcium hydroxide is known to have a strong antimicrobial effect and is a boneregeneration stimulant. In the production of metals, lime is injected into the waste gas stream to neutralize acids, such as fluorides and chlorides prior to being released to atmosphere. calcium hydroxide is an inorganic base used to adjust the pH of a product, it can also serve as a topical astringent and alkali in solutions or lotions. It can burn the skin and eyes. Calcium Hydroxide is a general food additive made by adding water to calcium oxide (lime). it has poor water solubility with a solubility of 0.185 g in 100 g of water at 0°c. the ph of a water solution at 25°c is approximately 12.4. it is used to promote dispersion of ingre- dients in sauces, creamed spinach, and a frozen pea/potato dish. it is used at 0.1% to stabilize the potassium iodide of iodized salt, and it is used as a neutralizer for soured cream prior to buttermaking. it is also termed hydrated lime, calcium hydrate, and slaked lime.
• Production method: Lime slaking method: first calcine limestone into calcium oxide, and the selected calcium oxide is slaked with water by the ratio of 1: (3~3.5). Then the generated calcium hydroxide solution is purified and separated to remove slag, and then centrifuged for dehydration. After further dried at 150~300℃, the above products is screened (120 mesh or more) to obtain the finished calcium hydroxide. CaCO3 → CaO + CO2↑ CaO + H2O → Ca(OH) 2
• Description: Calcium Hydroxide is a colorless crystal or white powder, obtained when CaO (called lime or quicklime) is mixed, or “slaked” with water. It can also be precipitated by mixing CaCl2 andNaOH.The nameof the natural,mineral formis “portlandite”. It is a relatively rare mineral, known from some volcanic, plutonic, and metamorphic rocks. It has also been known to be formed in burning coal dumps.
• Physical properties: Soft white crystalline powder; hexagonal; density 2.34 g/cm3; slightly bitter taste; loses water when heated at elevated temperatures (580°C); slightly soluble in water; Ksp 1.2x10-14; aqueous solution alkaline; soluble in glycerol and acids; insoluble in alcohol.

Technology Process of Slaked lime

There total 1 articles about Slaked lime which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield:

water (7732-18-5) + calcium (7440-70-2) → HCaOH (81514-87-6) + HCaOCaH (94592-81-1) + calcium dihydroxide (1305-62-0,7719-01-9)

Guidance literature:

In solid matrix; Irradiation (UV/VIS); heating of water, Ar (excess) and Ca at 465 - 550°C for 1 or 2 hin steel crucible in Ta furnace and cocondensation on mirrored Cu held at 15 K; photolysis of formed matrices with Xe or Hg lamp for 15 min to 2.5 h; reaction mechanisms described; not isolated; detn. by IR; mixture of HCaOH, HCaOCaH and Ca(OH)2 obtained;

upstream raw materials:

water

calcium

Refernces