| Chemical Properties | Back Directory | [solubility ]
insoluble in H2O, acid solutions | [form ]
white crystals | [color ]
white crystals, crystalline | [Water Solubility ]
insoluble H2O, acids [HAW93] | [Solubility Product Constant (Ksp)]
pKsp: 10.44 | [CAS DataBase Reference]
7446-16-4 |
| Hazard Information | Back Directory | [Chemical Properties]
white, rhomb crystal(s) when pure, else colored yellow, orange, pink; radioactive [HAW93] [CRC10] | [Description]
Radium sulfate has the molecular formula of RaSO4
and the molecular weight of 322.0626 g/mol. It can be
prepared by dissolving radium oxide in sodium sulfate
solution:
RaO+Na2SO4+H2O ? RaSO4+NaOH
Radium sulfate is insoluble in water with a solubility
product of 3.66×10-11. The solubility of radium sulfate
would appear as at least 100-fold less than barium
sulfate. Thus, it is the most insoluble sulfate known. Its
CAS Number is 7446-16-4. It appears as white crystals.
Since radium is a decay product in the 238U series which
then allows radon to accumulate in household basements,
it is RaSO4 that has received some attention in
the scientific literature. | [Uses]
Radium sulfate (RaSO4) is the most insoluble sulfate known in chemistry and is created
when radium combines with a sulfate ion (Ra + H2SO4 → RaSO4 + H2↑). |
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