BARIUM BROMATE

Description

Barium bromate is used extensively to form other bromates, including the alkali metal bromates which are used extensively in Industry. HBrO3, a colorless liquid, is made by the addition of dilute sulfuric acid to barium bromate. It dissociates extensively in aqueous solution and is a strong acid.
The scientific literature contains a few studies of barium bromate chiefly due to interest in Industry for its use to prepare other bromate salts. This salt is available commercially, worldwide.

Chemical Properties

Barium bromate is a white crystalline powder.

Uses

Barium bromate [Ba(BrO3)2] is used as a corrosion inhibitor to prevent rust and as an oxidizing agent and chemical reagent.

Uses

Analytical reagent, oxidizing agent, corrosion inhibitor.

Preparation

Barium Bromate may be prepared by reaction of the hydroxide with sodium bromate:
Ba(OH)2＋ 2NaBrO3→Ba(BrO3)2＋ 2NaOH
Barium bromate is relatively insoluble, and has a value of 0.782 g/100 ml of water at 298 K,if recrystallized, it forms a monohydrate, Ba(BrO3)2·H2O, which occurs as white or colorless, prismatic crystals.
A new and general method of inducing a precipitation from homogeneous solution has been applied to the separation of barium and strontium. The precipitation of barium bromate, a water-soluble compound, is brought about by a gradual change in the composition of the solvent media. An organic compound, such as methanol or tetrahydrofuran, is allowed to diffuse into the original water solution, thus slowly converting the solution into a water organic mixture. Strontium bromate is about 40 times more soluble in water than barium bromate. The increased solubility plus the greater stability of the strontium MEDTA chelate tend to hold the strontium in solution. The chief advantage of this method over the separation of Sr from Ba by precipitation of barium chromate is in the preparation of barium compounds. Usually, barium must be separated from the chromate before proceeding. However, barium bromate can be easily converted to the oxide, eliminating this separation step.

General Description

A white crystalline solid or powder. Slightly soluble in water and denser than water. Very toxic by ingestion or inhalation. Fire hazard when in contact with organic materials and may explode when heated above 300°F. Used as a corrosion inhibitor and to manufacture other chemicals.

Air & Water Reactions

Slightly soluble in water.

Reactivity Profile

BARIUM BROMATE is an oxidizing agent. May react violently with combustibles and reducing agents such as textiles, oil, fat, sugar, sawdust, ammonium salts, sulfur, carbon, phosphorus, metal powders and sulfides. A combination of finely divided aluminum with finely divided BARIUM BROMATE can explode by heat, percussion, or friction [Mellor 2:310 1946-47].

Hazard

A poison. Moderate fire risk in contact with organic materials.

Health Hazard

Toxic by ingestion. Inhalation of dust is toxic. Fire may produce irritating, corrosive and/or toxic gases. Contact with substance may cause severe burns to skin and eyes. Runoff from fire control or dilution water may cause pollution.

Fire Hazard

These substances will accelerate burning when involved in a fire. May explode from heat or contamination. Some may burn rapidly. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard.

Safety Profile

Very toxic. Fire hazard by chemical reaction with easily oxidued materials. Explodes at 300℃. Mmures with sulfur are unstable storage hazards; igniting immediately at 91 ℃ and after a 2-1 1 day delay period at room temperature. Incompatible with Al, As, C, Cu, metal sulfides, organic matter, P, and reducing materials. When heated to decomposition it emits toxic fumes of Br-. See also BARIUM COMPOUNDS (soluble) and BROMINE.

Potential Exposure

This material is used as an analytical reagent, oxidizer and corrosion inhibitor.

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit. Seealso First Aid section in “Barium” entry.

storage

Color Code—Yellow: Reactive Hazard; Store in alocation separate from other materials, especially flammablesand combustibles. Store in tightly closed containers in a cool,well-ventilated area. Sources of ignition, such as smokingand open flames, are prohibited where barium bromate ishandled, used, or stored. Avoid any possible contact withincompatible materials. See OSHA Standard 1910.104 andNFPA 43A Code for the Storage of Liquid and SolidOxidizers for detailed handling and storage regulations.

Shipping

UN2719 Barium bromate, Hazard Class: 5.1; Labels: 5.1—Oxidizer, 6.1—Poisonous materials.

Incompatibilities

A strong oxidizer; keep away from reducing agents. Keep away from oxidizable materials; aluminum, arsenic, carbon, copper, metal sulfides; phosphorus, sulfur, organic, and combustible materials (such as wood, paper, oil, fuels), since violent reactions occur.

Raw materials

Preparation Products