| Identification | Back Directory | [Name]
BARIUM SULFITE | [CAS]
7787-39-5 | [Synonyms]
BARIUM SULFITE
barium sulphite
Sulfurous acid barium salt | [EINECS(EC#)]
232-112-2 | [Molecular Formula]
BaO3S | [MDL Number]
MFCD00040662 | [MOL File]
7787-39-5.mol | [Molecular Weight]
217.39 |
| Chemical Properties | Back Directory | [Appearance]
White powder, decomposed by heat. Soluble in dilute hydrochloric acid; insoluble in water. | [Melting point ]
decomposed by heat [HAW93] | [density ]
4.440 | [solubility ]
insoluble in ethanol | [form ]
white monoclinic crystals | [color ]
white monoclinic crystals, crystalline | [Water Solubility ]
0.0197g/100g H2O (20°C); 0.0018g/100g (80°C); soluble dilute HCl [KIR78] [HAW93] | [Solubility Product Constant (Ksp)]
pKsp: 9.3 |
| Hazard Information | Back Directory | [Chemical Properties]
White powder, decomposed by heat. Soluble in dilute hydrochloric acid; insoluble in water. | [Uses]
In paper manufacture. | [Description]
Barium Sulfite can be
prepared by reacting sodiumsulfite with bariumchloride:
BaCl2＋ Na2SO3→BaSO3＋ 2NaCl
Barium Sulfite occurs as white,
monoclinic crystals with a density of 4.44 g/cm3. Its
solubility in water is low (0.001125 g/100 ml) and it is
insoluble in ethanol. When heated, it decomposes at
480°C to the oxide and SO2 gas.
It has been used as a weighting material on oil-drilling
rigs to prevent “blow out” during drilling operations.
This salt is used for such purposes, presumably
because of its ability to absorb SO2 and H2S gases trapped in the rocks as drilling proceeds. The demand for barium sulfite is low.
Barium sulfite is available in limited quantities,
commercially. | [Preparation]
Barium sulfite is produced by the reaction of barium hydroxide, water and sulfur dioxide, or by the reaction of barium hydroxide and potassium bisulfite. |
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