Sodium Pyroantimonate
Trade Name &
Synonyms
Sodium Hexahydroxyantimonate, Sodium Hexahydroantimonate, Sodium Hexahydroxoantimonate,
Industry Sodium Antimonate Trihydrate, Sodium Antimonate Hydration for Electronic, Sodium Antimonate.
Soluble in tartaric acid, sodium sulfide solution, concentrated sulfuric acid. Slightly soluble in alcohol,
silver salt. Insoluble in acetic acid ,dilute alkali, dilute inorganic acid and cold water.
Cas No.
12507-68-5, 33908-66-6
Molecular Formula
NaSb(OH)6, NaSbO3·3H2O, H2Na2O7Sb2
Molecular Weight
246.79
Appearance
White Powder
Melting Point
1200 ℃
Boiling Point
1400 ℃
Solubility
Enterprise Specification for Sodium Pyroantimonate
Moisture
Content
850μm Residue
on Sieve(%)
150μm Residue
on Sieve(%)
75μm Residue
on Sieve(%)
Symbol
Grade
Sb2O5 (%)
Na2O
Foreign Mat.≤(%)
Particle Size
As2O3
Fe2O3
CuO
Cr2O3
PbO
V2O5
UMSPS64
Superior
64.0～65.6
12.0～13.0
0.02
0.01
0.001
0.001
0.1
0.001
0.3
As customers' requirement
UMSPQ64
Qualified
64.0～65.6
12.0～13.0
0.1
0.05
0.005
0.005
-
0.005
0.3
Packing: 25kg/Bag, 50kg/Bag, 500kg/Bag, 1000kg/Bag.
What is Sodium Pyroantimonate used for?
Sodium Pyroantimonate is mainly used as clarifier and defoamer for photovoltaic solar glass, monochromatic and color display tube glass, gem glass and leather manufacturing. It is a pentavalent forms of antimony most widely used as flame retardants in electronic manufacturing, engineering thermoplastics, rubber. It is also used as flame retardants for electronic equipment casings, resistance combustion compartment, flame retardant wire, textiles, plastics, building materials, etc.
It has been proved by scientific experiments and production that it has better technical performance than antimony oxide to be used as a flame retardant. It has better flame retardancy, lower light blocking and lower tinting strength in saturated polyesters and engineering thermoplastics. It has the characteristics of low reactivity, which is an advantage in sensitive polymers such as PET. However, antimony oxide, which is commonly used as flame retardants, tends to cause depolymerization during handling.
By the way, Sodium Antimonate (NaSbO3) is also used in industrial applications where special colors are required or when antimony trioxide may produce unwanted chemical reactions (IPCS ).
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