| Identification | Back Directory | [Name]
trisodium antimonate(3-) | [CAS]
15593-75-6 | [Synonyms]
trisodium antimonate(V)
trisodium antimonate(3-) | [EINECS(EC#)]
239-670-6 | [Molecular Formula]
Na.1/3O4Sb | [Molecular Weight]
84.29 |
| Questions And Answer | Back Directory | [chemical properties]
Sodium antimonate [15593-75-6], Na2OSb2O5.1/2H2O, is a free-flowing white powder made by the oxidation of antimony trioxide in a basic medium.
The pigmenting strength of sodium antimonate is less than antimony trioxide. It is recommended for formulations in which deep tone colours are required. Because it contains 62 wt% antimony, somewhat higher concentrations are needed to make it as effective as antimony trioxide which has 83 wt % antimony.
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Property
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value
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physical form
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white powder
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antimony content
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61.7 wt%
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bulk density. kg / m3
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39.4-46.4
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specific gravity
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4.8
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fineness
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99.75% through 74 um (200 mesh) sieve
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| Hazard Information | Back Directory | [Uses]
Sodium antimonate is antimony synergist of commercial importance, has an antimony content of 61–63 wt % and a bulk density of 39.4–46.4 kg/m3. It is made by oxidizing antimony trioxide using sodium nitrate and caustic. It is a white powder and has a pH of around 9–11 when dissolved in water. Sodium antimonate contains less antimony than either antimony trioxide or pentoxide and is thus less effective. However, its unique pH and low refractive index makes the antimonate the most desirable synergist for polymers that hydrolyze when processed with acidic additives or in polymers for which deep color tones are specified. |
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