Corrosive fumes

Cyanogen bromide (Bromine cyanide) CNBr Extremely irritating and toxic vapours Contact with acids, acid fumes, water or steam can produce toxic and corrosive fumes Transparent crystals with a penetrating odour Melting point 52°C Boiling point 61 °C Vapour density 3.6 Water soluble... 

Benzoyl chloride C6H5COCI Colourless, fuming, corrosive liquid with a strong odour Combustible flash point 72°C Generates phosgene gas when heated Reacts strongly with water or water vapour, producing heat and toxic/corrosive fumes Use of water must be considered carefully... 

Sulphur monochloride S2CI2 Yellowish-red oily fuming liquid with a strong odour Combustible flash point 11 8°C Ignition temp. 233°C Liquid and vapours are irritating Decomposes when contacted by water, to produce heat and toxic/corrosive fumes Do not allow water to enter containers reaction can be violent Wash down spills with flooding amounts of water... 

Bromine is considered a moderate fire hazard. As liquid or vapor, it can enter spontaneous chemical reactions with reducing materials. It is a very powerful oxidizer. Bromine is considered a highly dangerous material. Upon being heated, it emits highly toxic fumes. It will react with water or steam to produce toxic and corrosive fumes. 

Sulfur dioxide is extremely stable to heat, even up to 3600°F. It docs not form flammable or cxplosi c mixtures witli air. It will, howe cr, react with water or steam to produce toxic and corrosive fumes.When the gas dissolves in water it forms a weak acid solution of sulfurous acid (H S03), which is corrosi C [Pg.274]

The physiological effects of N2O (laughing gas, anaesthetic) and NO2 (acrid, corrosive fumes) have been known from the earliest days, and the environmental problems of NOj from automobile exhaust fumes and as a component in photochemical smog are well known in all industrial countries. 

Totally-enclosed fan-cooled I, s 55°C 40 to 115% (135% for S) Abrasive dust, dirt, grit, corrosive fumes too severe for other types... 

Presence of corrosive fumes or liquids specify nature. 

Disaster hazard. Phosgene is highly dangerous. When heated to decompn, or on contact with w or steam, it wiii react to produce toxic and corrosive fumes (Ref 12). Powdered A1 burns in its vapor (Ref 3)... 

In one laboratory, an operation that occasionally produced highly corrosive fumes was confined to an alcove with special ventilation. Some items were treated with a catalyzed finish. After five years, the finish showed no signs of attack, unlike other items in the same area that were finished in a more conventional way. 

Hoods usually have a light built into a sealed opening, making it explosion-proof for use with flammables. Fans used for flam-mables must also be explosion-proof. Those used for corrosive fumes must be made of material resistant to such fumes. The ductwork must also be corrosion resistant, a matter often overlooked. Built-in exhaust fans make installation and servicing easy, but some tend to be noisy. Remotely installed fans are generally quieter and may serve more than one hood. The chief problem with fans is that they are often improperly serviced. Lubrication and belt tightness must be checked as specified by the manufacturer, or costly repairs will result. 

A laboratory can sometimes save money by building a simple hood where no hazardous, flammable, or corrosive fumes are involved. In one case, a hood was needed solely for drawing off unpleasant fumes from a muffle furnace and water vapor. A carpenter constructed a plywood box which reached from counter top to ceiling and had a large opening in the front. This was painted with a resistant paint, primarily to seal the surfaces and make them easy to clean. An inexpensive fan exhausted the hood to the outside. This simple hood worked for many years. 

ABS/PVC alloys are appreciated for their inherent flame resistance, but beware of toxic and corrosive fumes good impact resistance resistance to certain chemicals good UV resistance of suitable grades fair mechanical properties attractive price/property ratios fair dimensional stability easier processing than PVC weak absorption of water good electrical insulation even in wet environments, feasibility of welding. 

Apart from these synthetically impractical examples of hydrolysis of chloro-fluorocarbons, there are useful applications converting some chlorofluorocarbons to fluonnated carboxylic acids. As an alternative to the use of the highly corrosive fuming sulfuric acid, normally used in batch processes, a continuous hydrolytic process for converting 1,1,1-trichlorotrifluoroethane (CFC-113a), available by isomerization of CFC-113 [44], to trifluoroacetic acid has been developed [45] (equation 45). It uses metal chloride catalysts deposited on high-surface-area supports Unreacted CFC-113a can be recycled. 

Bromine Fluorides. The following compds are described in the literature Bromine monofluori.de, BrF, mw 98.92, red-bra unstable gas, fr p -33°, bp 20° is formed from the ttifluoride bromine (Ref 2). Bromine trifluoride, BrFg, mw 136.92, col to gray-yel liq, ft p 8.8°, bp 135°, d 2,49 at 135° is formed from fluorine and bromine or HBr (Ref 2). Bromine pentafluori.de, BrFg, mw 174.92, col liq, fr p -61.3°, bp 40.5°, d 2.47 at 25°, vap d 6.05 is formed from the elements at 0°(Ref 2). Sax(Ref 3) considers these compds to be dangerous when heated to decompn or on contact with an acid or acid fumes, since they emit highly toxic fumes of bromine fluorine they react with w or steam to produce heat, toxic and corrosive fumes... 

As shown by Leonard (1988), purge air can be used to protect motor (or rotor) bearings from corrosive fumes in the contactor stage. This approach can work well as... 

Reacts with water or steam to produce toxic and corrosive fumes.1... 

Decomposes to fumes of F and SOx when heated. Reacts with water, steam, and acids to give toxic and corrosive fumes.2 Powerful methylating agent.3,4... 

Technical material is ignitable (possibly due to presence of dichlorosilane).4 Oxidizing Materials. Can react vigorously on contact with oxidizing materials.1 Water. Will react with water or steam to produce heat and toxic and corrosive fumes.1... 

Mildly toxic. Heat can cause toxic fumes. Contact with water or steam can cause toxic and corrosive fumes. 

---