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Barium hydroxide

Basic information Description References Safety Related Supplier

Barium hydroxide Basic information

Product Name:
Barium hydroxide
CAS:
17194-00-2
MF:
BaH2O2
MW:
171.34
EINECS:
241-234-5
Mol File:
17194-00-2.mol
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Barium hydroxide Chemical Properties

Melting point:
>300 °C(lit.)
Boiling point:
decomposes at 1032 (calculated) [KNA91]
Density 
2.2 g/mL at 25 °C(lit.)
form 
Solid
color 
Clear
Water Solubility 
Soluble in water.
Sensitive 
Air Sensitive & Hygroscopic
Merck 
14,977
Stability:
Stable. Incompatible with acids, carbon dioxide, moisture.
InChIKey
RQPZNWPYLFFXCP-UHFFFAOYSA-L
CAS DataBase Reference
17194-00-2(CAS DataBase Reference)
NIST Chemistry Reference
Barium dihydroxide(17194-00-2)
EPA Substance Registry System
Barium hydroxide (Ba(OH)2) (17194-00-2)
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Safety Information

Hazard Codes 
C,Xi,Xn
Risk Statements 
36/37/38-34-20/22-36/38-41-35-22
Safety Statements 
26-36/37/39-45-36/37
RIDADR 
UN 3262 8/PG 2
WGK Germany 
1
RTECS 
CQ9200000
TSCA 
Yes
HazardClass 
8
PackingGroup 
III
Hazardous Substances Data
17194-00-2(Hazardous Substances Data)

MSDS

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Barium hydroxide Usage And Synthesis

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.

References

[1]Wu, Mingmei, et al. "Hydrothermal Synthesis of Tetragonal Barium Titanate from Barium Hydroxide and Titanium Dioxide under Moderate Conditions." Journal of the American Ceramic Society 82.11 (2010):3254-3256.
[2]Meier, Hans, et al. "Barium Hydroxide as a Selective Precipitating Agent for Hemicelluloses." Acta Chemica Scandinavica 12.1(1958):144-146.
[3]Gruppen, H., R. J. Hamer, and A. G. J. Voragen. "Barium hydroxide as a tool to extract pure arabinoxylans from water- insoluble cell wall material of wheat flour." Journal of Cereal Science 13.3(1991):275-290.
[4]Li, Ping Lu, D. Kabra, and R. H. Friend. "Barium Hydroxide as an Interlayer Between Zinc Oxide and a Luminescent Conjugated Polymer for Light-Emitting Diodes." Advanced Functional Materials 22.19(2012):4165–4171.
[5]Bologo, V., J. P. Maree, and F. Carlsson. "Application of magnesium hydroxide and barium hydroxide for the removal of metals and sulphate from mine water." Water Sa 38.1(2012):23-28.
[6]Sinisterra, J. V., A. Fuentes, and J. M. Marinas. "Barium hydroxide as catalyst in organic reactions. 17. Interfacial solid- liquid Wittig-Horner reaction under sonochemical conditions." J.org.chem (1987).

Description

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.

Chemical Properties

Barium hydroxide,Ba(OH)2·8H20, is a white crystalline powder, colorless solid composed of monoclinic crystals. It has a melting point of 78°C and is soluble in water and insoluble in acetone. It is used in the fusion of silicates and fat saponification.

Uses

Carbon dioxide absorbant.

Uses

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

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Barium hydroxide SupplierMore

Wuhan Xingzhongcheng Technology Co., Ltd. Gold
Tel:
18627766980
Email:
914018854@qq.com
J & K SCIENTIFIC LTD.
Tel:
010-82848833- ;010-82848833-
Email:
jkinfo@jkchemical.com;market6@jkchemical.com
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel:
21-61259100-
Email:
sh@meryer.com
Alfa Aesar
Tel:
400-610-6006; 021-67582000
Email:
saleschina@alfa-asia.com
Beijing dtftchem Technology Co., Ltd.
Tel:
13651141086; 86(10)60275028、60275820
Email:
dtftchem@sina.com
Basic information Description References Safety Related Supplier