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Properties of substance:
sodium dithionate dihydrate
Group of substances:
inorganic
Physical appearance:
colorless rhombic crystals
Empirical formula (Hill's system for organic substances):
H
4
Na
2
O
8
S
2
Structural formula as text:
Na2S2O6 * 2H2O
Molar/atomic mass: 242.136
Decomposition temperature (°C):
110
Solubility (g/100 g of solvent):
ethanol
: insoluble [
Ref.
]
water
: 40.5 (16°C) [
Ref.
]
water
: 77.4 (100°C) [
Ref.
]
Density:
2.19 (20°C, g/cm
3
)
Reactions of synthesis:
[
Ref.1
]
MnO
2
+ 2SO
2
→ MnS
2
O
6
MnS
2
O
6
+ Na
2
CO
3
+ 2H
2
O → Na
2
S
2
O
6
* 2H
2
O + MnCO
3
References:
Волков А.И., Жарский И.М. Большой химический справочник. - Минск: Современная школа, 2005. - pp. 181 [Russian]
Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 164-165 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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