Sodium bromate
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Sodium bromate
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CAS No:
7789-38-0
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Formula:
BrHO3.Na
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Chemical Name:
Sodium bromate
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Synonyms:
Bromic acid,sodium salt (1:1);Bromic acid,sodium salt;Sodium bromate;Neutralizer K 126;Neutralizer K 140;Neutralizer K 938;Sodium bromate (NaBrO3);38869-75-9;38869-76-0;2356137-58-9
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CAS No:
Description
White crystals or powder; odorless. Soluble in water; insoluble in alcohol. Sodium bromate is a colorless or white crystalline solid. Odorless.
Characteristics
57.2
0.48920
White Powder/Solid
3.339 g/cm3 @ Temp: 17.5 °C
381 °C
1390 °C
1.594
H2O: 364 g/L (20 ºC)
Store below +30°C.
1 mm Hg ( 806 °C)
Abdominal cavity-mouse LD50: 140 mg/kg
Combustion produces toxic bromide and sodium oxide fumes
Odorless
Aqueous solution is neutral
Safety Information
II
5.1
UN 1494 5.1/PG 2
3
8-22-36/37/38-9-36/37
17-26-36-37/39
VZ3150000
O,Xn,Xi
The warehouse is ventilated, low temperature and dry; lightly loaded and unloaded; stored separately from organic materials, reducing agents, sulfur, phosphorus and flammable materials, food raw materials
Oxidising Agent/Harmful
Mixed with reducing agent, sulfur, phosphorus, etc., heated, impacted, friction can be explosive
Stable. Oxidizer. Incompatible with finely powdered metals, alcohols, strong acids, strong reducing agents.
P220-P261-P305 + P351 + P338
H272-H302-H315-H319-H335
Sodium bromate Use and Manufacturing
In the chlorine oxidation method, the lime milk prepared with lime powder and water is added dropwise with bromine to produce calcium bromate and calcium bromide, and then chlorine gas is introduced for oxidation reaction. After filtering and washing, the filtrate is concentrated. Barium chloride solution is added at low temperature for reaction. The barium bromate produced in the reaction is washed with water and then metathesized with sodium carbonate, and then filtered, evaporated, crystallized, separated and dried to obtain sodium bromate. Its 6Ca(OH)2+6Br2→Ca(BrO3)2+5CaBr2+6H2OCaBr2+6C12+6Ca(OH)2→Ca(BrO3)2+6CaCl2+6H2OCa(BrO3)2+BaCl2→Ba(BrO3)2↓+ CaCl2Ba(BrO3)2+Na2CO3→2NaBrO3+BaCO3↓
As a mixture with sodium bromide for dissolving gold from its ores.
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