Hydrogen bromide disposal

Caution) Carry out all procedures in a well-ventilated hood, and wear disposable vinyl or latex gloves and chemical-resistant safety goggles. Hydrogen bromide in acetic acid gives corrosive and dangerous fumes. 

In a i-L three-necked flask is placed 300 g. (2.19 moles) of technical -nitrotoluene (m.p. 51-52°). The flask is fitted with a liquid-sealed stirrer, reflux condenser, and a separatory funnel arranged so that the stem reaches nearly to the bottom of the flask. The condenser is provided with a tube for disposing of the hydrogen bromide evolved (Org. Syn. 14, 2). The flask is heated in oil bath at 145-150° (Note i), and 368 g. (118 cc., 2.3 moles) of bromine is added dropwise over a period of two hours (Note 2). 

Carefully neutralize spills of hydrobromic acid with a suitable agent such as powdered sodium bicarbonate, further dilute with absorbent material, place in an appropriate container, and dispose of properly. Dilution with water before applying the solid adsorbent may be an effective means of reducing exposure to hydrogen bromide vapor. Respiratory protection may be necessary in the event of a large spiU or release in a confined area. 

Disposal In many localities, hydrobromic acid or the residue from a spiU may be disposed of down the drain after appropriate dilution and neutralization. Otherwise, hydrobromic acid and waste material containing this substance should be placed in an appropriate container, clearly labeled, and handled according to your institution s waste disposal guidelines. Excess hydrogen bromide in cylinders should be returned to the... 

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