Barium hydroxide Properties
| Other names | Barium hydroxide monohydrate, Barium hydroxide octahydrate |
| CAS No. | 17194-00-2 |
|
|
22326-55-2 (monohydrate) |
|
|
12230-71-6 (octahydrate) |
| Chemical formula | Ba(OH)2 |
| Molar mass | 171.34 g/mol (anhydrous), |
|
|
189.355 g/mol (monohydrate) |
|
|
315.46 g/mol (octahydrate) |
| Appearance | white solid |
| Density | 3.743 g/cm3 (monohydrate) |
|
|
2.18 g/cm3 (octahydrate, 16 °C) |
| Melting point | 78 °C (172 °F; 351 K) (octahydrate) |
|
|
300 °C (monohydrate) |
|
|
407 °C (anhydrous) |
| Boiling point | 780 °C (1,440 °F; 1,050 K) |
| Solubility in water | mass of BaO (not Ba(OH)2): |
|
|
1.67 g/100 mL (0 °C) |
|
|
3.89 g/100 mL (20 °C) |
|
|
4.68 g/100 mL (25 °C) |
|
|
5.59 g/100 mL (30 °C) |
|
|
8.22 g/100 mL (40 °C) |
|
|
11.7 g/100 mL (50 °C) |
|
|
20.94 g/100 mL (60 °C) |
|
|
101.4 g/100 mL (100 °C)[citation needed] |
| Solubility in other solvents | low |
| Basicity (pKb) | 0.15 (first OH–), 0.64 (second OH–) |
| Magnetic susceptibility (χ) | −53.2·10−6 cm3/mol |
| Refractive index (nD) | 1.50 (octahydrate) |
Enterprise Specification for Barium Hydroxide Octahydrate
| Item No. | Chemical Component | |||||||
| Ba(OH)2∙ 8H2O ≥(wt%) | Foreign Mat.≤（wt%） | |||||||
| BaCO3 | Chlorides (based on chlorine) | Fe | HCI insoluble | Sulfuric acid not sediment | Reduced iodine (based on S) | Sr(OH)2∙8H2O | ||
| UMBHO99 | 99.00 | 0.50 | 0.01 | 0.0010 | 0.020 | 0.10 | 0.020 | 0.025 |
| UMBHO98 | 98.00 | 0.50 | 0.05 | 0.0010 | 0.030 | 0.20 | 0.050 | 0.050 |
| UMBHO97 | 97.00 | 0.80 | 0.05 | 0.010 | 0.050 | 0.50 | 0.100 | 0.050 |
|
UMBHO96
|
96.00 | 1.00 | 0.10 | 0.0020 | 0.080 | - | - | 1.000 |
What are Barium Hydroxide and Barium Hydroxide Octahydrate used for?
Industrially, barium hydroxide is used as the precursor to other barium compounds. The monohydrate is used to dehydrate and remove sulfate from various products. As laboratory uses, Barium hydroxide is used in analytical chemistry for the titration of weak acids, particularly organic acids.
Barium hydroxide octahydrate is extensively used in the manufacturing of barium salts and barium organic compounds; as an additive in the petroleum industry; In manufacture of alkali, glass; in synthetic rubber vulcanization, in corrosion inhibitors, pesticides; boiler scale remedy; Boiler cleaners, in the sugar industry, fix animal and vegetable oils, soften water, make glasses, paint the ceiling; Reagants for CO2 gas; Used for fat deposits and silicate smelting.
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