Bromate, barium

Sttemitted bt D. W. Pearce and R. G. RussELL t Checked bt Laurence L. QuillJ 

Barium bromate is useful in the preparation of the bromates of other elements, particularly those of the yttrium group of the rare earths (Synthesis 17). Workers in this field have found that the freshly prepared material is usually more satisfactory than that which is commercially available the differential in cost also definitely favors the former. The synthesis is carried out by pouring together hot saturated solutions of barium chloride and potassium bromate. Barium bromate in the form of a fine crystalline powder is obtained. 

Three hundred forty-five and seven-tenths grams of potassium bromate is dissolved in about 700 ml. of water at almost the boiling temperature. To this is added a hot solution of 253 g. of barium chloride 2-hydrate in 400 ml. of water. The resulting mixture is allowed to cool, the solution is decanted from the crystals, and the latter washed several times with 100-ml. portions of cold water. Yield about 410 g. As prepared in this way, the material 

Barium bromate, Ba(Br0s)2-H20, is a stable, colorless crystalline material that may be dehydrated without decomposition. It is soluble in cold water to the extent of less than 1 g./lOO ml. but is approximately seven times as soluble at 100°. It is insoluble in most organic solvents. Barium bromate upon long standing may develop a slight odor of bromine. 

Inorganic Syntheses, Volume II Edited by W Conard Feriielius 11946 by McGraw-Hill Book Company, Inc. 

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Interaction with moist barium bromate is very violent, and mixtures with potassium bromate and water (3-4%) ignite at 20°C. In absence of water, ignition occurs at 125°C. Silver bromate also deflagrates. 

MRH values Ammonium bromate 4.52/82, ammonium chlorate 6.36/76, ammonium perchlorate 6.53/70, barium bromate 3.97/76, barium chlorate 4.85/72, calcium bromate 5.02/70, calcium chlorate 6.53/62, potassium bromate 4.56/73, potassium chlorate 5.81/56, potassium perchlorate 6.07/63, silver chlorate 4.60/73, sodium bromate 4.85/70, sodium chlorate 6.90/63, sodium perchlorate 6.69/60... 

Barium-bearing manganese silicon, 22 519 Barium P-alumina, 2 406t Barium bromate, 4 335 Barium bromide, 3 355... 

Ammonium dichromate Ammonium nitrate Ammonium perchlorate Ammonium permanganate Ammonium persulfate Amyl nitrate Barium bromate Barium chlorate Barium hypochlorite Barium perchlorate Barium permanganate Barium peroxide Bromine pentafluoride Bromine trifluoride l-Bromo-3-chloro-5,5-dimethylhydantoin (BCDMH)... 

Barium bromate, 0202 Barium iodate, Barium iodate, 0211 Bromic acid, 0248 Lead bromate, 0278... 

Barium bromate [Ba(BrO )2] is used as a corrosion inhibitor to prevent rust and as an oxidizing agent and chemical reagent. 

Bromic acid is prepared by adding sulfuric acid to barium bromate. 

W. Eidmann says barium bromate is not soluble in acetone. W. D. Harkins has measured the effect of various salts on the solubility of barium bromate. 

The rare earths furnish soluble chlorates and bromates, and sparingly soluble iodates. The chlorates and bromates of the rare earths were prepared by C. F. Rammelsberg and J. C. G. de Marignac by covering barium bromate with water on a water-bath, and gradually adding with constant stirring-the neutral rare earth sulphate. The barium sulphate is removed by filtration, and the bromate VOL. II. 2 A... 

Barium bromate [13967-90-3] M 265.3. Crystd from hot water (20ml/g). 

Cerium (TV) ammonium nitrate (CAN)37 and a cerium (TV) impregnated resin38 are able to catalyze the selective oxidation of secondary alcohols with sodium bromate (NaBrOi). Stoichiometric cerium bromate— CelBrCb h, prepared in situ from barium bromate and cerium (III) sulfate, is also able to perform selective oxidations of secondary alcohols.39... 

Barium bromate, 0202 Barium iodate, 0211 Bromic acid, 0248 Lead bromate, 0277 Mercury(I) bromate, 0270 Potassium iodate, 4614 Silver iodate, 0020 Sodium iodate, 4619 Zinc bromate, 0278 See other METAL OXOHALOGENATES... 

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