Ignitable chemicals

Vanadium Carbide. Vanadium pentoxide [1314-62-17, V2O5, or vanadium trioxide [1314-34-7] VO3, are the most satisfactory oxides for the preparation of VC. Vanadium pentoxide is best prepared by igniting chemically pure ammonium vanadate [7803-55-6] NH VO, in the presence of moist oxygen to avoid reaction with nitrogen V2O3 is obtained by reduction of V2O3 with hydrogen (see Vanadium compounds). 

CM are speciality elastomers that can be crosslinked either by curing agents or irradiation leading to parts with fair flexibility, resistance to heat, oils and fuels, ignition, chemicals, low temperatures and weathering. 

Animal glues continue to be used for the production of book and wooden stick matches. Efforts to replace it have been without success. The production of matches is dependent on the presence of the animal glue in the head. It not only serves as the binder for the ignition chemicals, combustible fillers, and inert materials, but also because of its air-entraining properties ensures a match head of proper density and burning characteristics. 

It is important to identify any chemicals that require special treatment during the course of an emergency. For example, the use of water on some chemicals may cause them to ignite. Chemicals such as these will need their own special means of response. 

In the event of leakage failure, the hazard consequences can range from no effect to very serious effects. Suffocation or poisoning can occur, depending on the nature of the contained fluid, if the leakage occurs into a closed space. Fire and explosion can cause physical hazards when a flammable fluid ignites. Chemical and thermal bums can result from contact with process liquids. 

Examples of ignitable chemical waste that might be found in a laboratory ... 

The match industry consumes animal glue in the manufacturing of strike-anywhere, book matches, and wooden safety matches. Glues of various tests and foam characteristics are specially formulated. The glue acts as a binder for the ignition chemicals, combustible fillers, and inert materials and is also an important contributing factor in the formation of a head of correct density, form, and strength. 

For diesel engines, the fuel must have a chemical structure that favors auto-ignition. This quality is expressed by the cetane number. 

Flash points and autoignition temperatures are given in Table 11. The vapor can travel along the ground to an ignition source. In the event of fire, foam, carbon dioxide, and dry chemical are preferred extinguishers. The lower and upper explosion limits are 1% and 7%. 

Peroxy and hydroperoxy radicals play important roles ia the knock process. A number of good reviews have discussed the details of the chemical mechanisms (16). Ignition delay (tau) has also been used for description of the chemical tendency to knock (17). The chemical factors affecting knock are... 

Fig. 6. Schematic ignition diagram for a hydrocarbon+ O2 mixture, with appHcations. Region A, very rapid combustion, eg, a jet engine region B, low temperature ignition, eg, internal combustion engine, safety ha2ards regions C and D, slow oxidation to useful chemicals, eg, 0-heterocycHc compounds in C and alcohols and peroxides in D. Courtesy of Blackwell Scientific PubHcations, Ltd., Oxford (60).

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