Barium hydroxide octahydrate Chemical Properties

Melting point:

78 °C(lit.)

Boiling point:

780°C

Density 

2.18

storage temp. 

Store at +5°C to +30°C.

solubility 

72g/l

form 

Solid

Specific Gravity

2.18

color 

White

PH

14 (H2O, 20℃)(saturated aqueous solution)

Odor

Odorless

PH Range

12.5 at 50 g/l at 20 °C

Water Solubility 

56 g/L (15 ºC)

Sensitive 

Air Sensitive & Hygroscopic

Merck 

14,977

Exposure limits

ACGIH: TWA 0.5 mg/m3
NIOSH: IDLH 50 mg/m3; TWA 0.5 mg/m3

Stability:

Stable.

CAS DataBase Reference

12230-71-6(CAS DataBase Reference)

Safety Information

Hazard Codes 

C

Risk Statements 

20/22-34-20/21

Safety Statements 

26-36/37/39-45

RIDADR 

UN 3262 8/PG 2

WGK Germany 

1

RTECS 

CQ9200000

F 

9-34

TSCA 

Yes

HazardClass 

8

PackingGroup 

III

HS Code 

28164000

Toxicity

LD50 orally in Rabbit: 550 mg/kg

MSDS

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Barium hydroxide octahydrate Usage And Synthesis

Description

Barium hydroxide is available as colourless or white crystals. It is odourless and soluble in water. It is stable under ordinary conditions of use and storage. It is incompatible with acids, oxidisers, and chlorinated rubber. Barium hydroxide is corrosive to metals such as zinc. Barium hydroxide is very alkaline and rapidly absorbs carbon dioxide from air, becoming completely insoluble in water. Barium hydroxide is used in analytical chemistry for the titration of weak acids. Barium hydroxide is used in organic synthesis as a strong base. Barium hydroxide decomposes to barium oxide when heated to 800°C.

Chemical Properties

white crystalline powder

Uses

Used in manufacture of alkali, glass; in synthetic rubber vulcanization, alkalizing agent in water softening, boiler scale remedy, softening water.Barium hydroxide octahydrate is used in the centromeric heterochromatin banding technique. It acts as a precursor to prepare barium titanate, barium sulfate, barium phosphate and barium sulfide. Further, it is used in analytical chemistry for the titration of weak acids especially organic acids. It is involved in the preparation of cyclopentanone, diacetone alcohol and D-Gulonic gamma-lactone. In addition to this, it finds application in ester hydrolysis such as dimethyl hendecanedioate and decarboxylation of amino acids.

Uses

Barium hydroxide octahydrate is extensively used in the manufacturing of barium salts and barium organic compounds; In manufacture of alkali, glass; in synthetic rubber vulcanization, in corrosion inhibitors, pesticides, sugar industry; boiler scale remedy; refining animal and vegetable oils; softening water. Catalyst in organic synthesis.

Uses

In manufacture of alkali, glass; in synthetic rubber vulcanization, in corrosion inhibitors, pesticides, sugar industry; boiler scale remedy; refining animal and vegetable oils; softening water. Catalyst in organic synthesis.

Application

Catalyzes the β-elimination of phosphoserine residues.
Resin stabilizer; manufacture of oil and grease additives; raw material of pigment; sulfate removal agent.

Purification Methods

It crystallises from water (1mL/g) and readily absorbs CO2 from air. It effloresces to the monohydrate. It dehydrates to Ba(OH)2 in dry air at 100o. An aqueous solution (baryta water) absorbs CO2 to form a white precipitate of BaCO3.

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