Barium hydroxide

Base Information

• Chemical Name: Barium hydroxide
• CAS No.: 17194-00-2
• Molecular Formula: BaH2O2
• Molecular Weight: 171.345
• Hs Code.: 2816400000
• European Community (EC) Number: 241-234-5
• UNII: 1OHB71MYBK
• DSSTox Substance ID: DTXSID10892155
• Nikkaji Number: J43.680A
• Wikipedia: Barium hydroxide,Barium_hydroxide
• Wikidata: Q407605
• Mol file: 17194-00-2.mol

Synonyms:barium hydroxide;barium hydroxide monohydrate;barium hydroxide octahydrate;barium hydroxide, monohydrate;barium hydroxide, octahydrate

Chemical Property of Barium hydroxide

Chemical Property:

• Appearance/Colour: white crystalline powder
• Melting Point: >300 °C(lit.)
• Boiling Point: decomposes at 1032 (calculated) [KNA91]
• PSA: 40.46000
• Density: 2.2 g/mL at 25 °C(lit.)
• LogP: -0.35360
• Sensitive.: Air Sensitive & Hygroscopic
• Water Solubility.: Soluble in water.
• Hydrogen Bond Donor Count: 2
• Hydrogen Bond Acceptor Count: 2
• Rotatable Bond Count: 0
• Exact Mass: 171.910726
• Heavy Atom Count: 3
• Complexity: 0

Purity/Quality:

98% ^*data from raw suppliers

Barium hydroxide ^*data from reagent suppliers

Safty Information:

• Pictogram(s): C,Xi
• Hazard Codes: C,Xi,Xn
• Statements: 36/37/38-34-20/22-36/38-41-35-22
• Safety Statements: 26-36/37/39-45-36/37

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Metals -> Metals, Inorganic Compounds
• Canonical SMILES: [OH-].[OH-].[Ba+2]
• Description: Barium hydroxide is a kind of barium base. It has many kinds of applications. It can be used as the precursor for the preparation of other barium compounds. Its monohydrate form can be used to dehydrate and remove sulfate in many products. In laboratory, it can be used in analytic chemistry for the titration assay of organic acid. In organic synthesis, it is a strong base used for the hydrolysis of esters and nitriles. It is also a useful catalyst of organic synthesis. Other applications also include acting as an interlayer between zinc oxide and a luminescent conjugated polymer for light-emitting diodes, extracting pure arabinoxylans from water-insoluble cell wall material of wheat flour, removing sulfate and metals from the water and acting as a selective precipitating agent for hemicelluloses. Barium Hydroxide occurs as an anhydrate whose prismatic, colorless crystals are very deliquescent. Barium hydroxide can be prepared by dissolving barium oxide (BaO) in water: BaO＋ 9H2O→Ba(OH)2·8H2O It crystallizes as the octahydrate, which converts to the monohydrate upon heating in air. Barium oxide has been found to react with water vapor at temperatures from 1443 to 1593 K to form gaseous Ba(OH)2 according to the reaction: BaO(solid)＋H2O(gas)→Ba(OH)2(gas) A better method of preparation involves addition of NaOH to the nitrate. Since barium hydroxide is fairly soluble, it is necessary to evaporate the solution to crystallize Ba(OH)2·8H2O. Ethanol is added to aid in this crystallization. The crystals are washed in cold ethanol to remove sodium ions and then dried.
• Uses: Barium hydroxide, especially the monohydrate, is used to produce organic barium compounds such as additives for oil and stabilizers for plastics. In addition, barium hydroxide is used for. dehydration and deacidification, especially for removing sulfuric acid from fats, oils, waxes, and glycerol. In some applications, e.g., removal of sulfate from water and as starting material for other barium compounds, barium hydroxide to some ex1ent replaces barium carbonate. The earlier use of the hydroxide in some countries forextracting the residual sucrose from molasses is no longer of much significance. The re- cent patent literature describes a procedure in which barium hydroxide is reacted with hydrogen peroxide to produce barium peroxide monohydrate. Bariium hydroxide is used as a precursor to other barium compounds. It is used in analytical chemistry for titration of weak acids, particularly organic acids. It removes the carbonate in water. It is a strong base, and is used as catalyst in many organic reactions, such as hydrolysis of esters and nitriles, decarboxylation of amino acids, selective hydrolysis of one of the ester groups in dimethyl hendecanedioate, and preparation of cyclopentanone, diacetone alcohol and D-Gulonic gamma-lactone. Carbon dioxide absorbant. Barium hydroxide is used in analytical chemistry to titrate weak acids, particularly organic acids. It forms clear aqueous solutions that are free from carbonate, unlike those of the alkali hydroxides, since barium carbonate is insoluble in water. This allows the use of indicators such as phenolphthalein or thymophthalein (with alkaline color changes) without the risk of titration errors due to the presence of weakly basic CO32- ions.Barium hydroxide is used in organic synthesis as a strong base, for example for the hydrolysis of esters and nitriles.It has been used to hydrolyze one of the two equivalent ester groups in dimethyl endecanedioate. It is also used in the preparation of cyclopentanone, diacetone alcohol and d-Gluonic g-lactone. Barium hydroxide is used as an additive in thermoplastics (such as phenolic resins), rayon and PVC stabilizers to improve plastic properties. This material is used as a general-purpose additive for lubricants and greases. Other industrial applications for barium hydroxide include sugar fabrication, manufacturing soaps, fat saponification, fusing of silicates and chemical synthesis of other barium compounds and organic compounds. Barium hydroxide is offered for sale both as the octahydrate and the monohydrate. It is available in large quantities commercially.
• Physical properties: Monohydrate, Ba(OH)2?H2O is a white powder; density 3.743 g/cm3; slightly soluble in water; soluble in dilute mineral acids. Octahydrate, Ba(OH)2?8H2O is a colorless monoclinic crystal; density 2.18 g/cm3 at 16°C; refractive index 1.50; melts at 78°C; vapor pressure 227 torr; loses seven molecules of water of crystallization when its solution is boiled in the absence of atmospheric CO2 forming solid monohydrate; further heating produces anhydrous Ba(OH)2 melting at 407°C; readily dissolves in water (3.76 g/100 g at 20°C and 11.7 g/100 g at 50°C); aqueous solution highly alkaline; also soluble in methanol; slightly soluble in ethanol; insoluble in acetone.

Technology Process of Barium hydroxide

There total 1 articles about Barium hydroxide 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) + barium (7440-39-3) → barium hydroxide (12009-08-4) + HBaOH (81514-89-8) + barium dihydroxide (17194-00-2)

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 HBaOH, Ba(OH)2 and Ba(OH) obtained;

upstream raw materials:

water

barium

Refernces