Beryllium peroxydisulfate remains unknown.
Magnesium peroxydisulfate has the molecular
formula of MgS2O8 and the molecular weight of 216.4322 g/mol. It can be prepared by the reaction of
barium peroxydisulfate with magnesium sulfate in
solution:
BaS2O8(aq)+ MgSO4(aq) ? BaSO4(solid)+ MgS2O8(aq)
The barium sulfate precipitate is removed by filtration
and the solution is evaporated at a low temperature
of about 15–20°C to produce the hexahydrate,
MgS2O8·6H2O.
STRONTIUM PEROXODISULFATE
Strontium peroxodisulfate has the molecular formula
of SrS2O8 and a molecular weight of 279.7472 g/mol. It
has been synthesized by the reaction of solid Sr(OH)2,
taken in 30% excess, with an aqueous solution of
(NH4)2S2O8:
Sr(OH)2
+ (NH4)2S2O8 ? SrS2O8
+ 2NH4OH
This solution is then evaporated at low temperature
to form crystals of the tetrahydrate. Strontium peroxydisulfate
has been used to etch copper circuits in the
manufacture of integrated circuits for computers and
the like. However, it is only mentioned in patents and
there are no papers in the scientific literature describing
its physical properties.
BARIUM PEROXODISULFATE
Barium peroxodisulfate has the molecular formula of
BaS2O8 and a molecular weight of 329.4572 g/mol. It has
been synthesized by the reaction of solid Ba(OH)2, taken
in 30% excess, with an aqueous solution of (NH4)2S2O8:
Ba(OH)2+ (NH4)2S2O8 ? BaS2O8+2NH4OH
This solution is then evaporated at low temperature
to form crystals of the tetrahydrate.
Barium peroxydisulfate has been used to etch copper
circuits in the manufacture of integrated circuits for
computers and the like. However, it is only mentioned
in patents and there are no papers in the scientific literature
describing its physical properties.
Barium peroxydisulfate, BaS2O8, in sharp contrast
with the sulfate, is soluble in water. Among the uses of
this compound is the saponification of fats and of soap, the oxidation of some dyestuffs and the promotion
of certain polymerization processes, especially in the
synthetic rubber industry.
