Canister, gas mask

The main reaction is the stoichiometric one, AgO + CO —> Ag + CO2, although some catalytic action is also evident. The silver peroxide is supported on asbestos in the form of small cubes or cylinders prepared by extrusion. The preparation does not react with carbon dioxide to an appreciable extent and is much more stable than hopcalite in the presence of water vapor. Because of its relative stability to water vapor, it may be used in a gas mask canister without the incorporation of drying agents, such as are necessary in hopcalite canisters. 

Uses In granular form and in combination with soda lime as gas-mask canister filling. Only chars of considerable density, specially prepared for such uses, are suitable for gas masks.9 ... 

Uses In gas-mask canisters for destruction of toxic gases. As detonator ingredient, P31. 

Beat type of filter in gas-mask canister (14) Caustic gaseous cblo-rtne Chlorine in low concentrations Burning-type munitions 1 green band DA gas... 

On account of its low volatility (0.60 ing. per liter at 68 F.), xylyl bromide was not very effective at low temperatures, and it was also very readily absorbed by the charcoal in gas-mask canisters, so that mask.M furnished adequate protection against it. Owing to these facts... 

Diphenylchlorarsine was introduced simultaneously with mustard gas as an offensive companion thereto, since mustard gas was too per-Hi.stent to be used on the tactical offensive. The purpose of diphenyl-chlorarsine was to penetrate the Allies masks, which successfully protieeted against all the lung-injurant agents. This was accomplished by dispersing the chemical substance in the form of a duet which, not being a vapor or gas, was not absorbed by the charcoal and soda lime in the gas-mask canister. 

Like diphenylehlorarsine, diphenylaminechlorarsine is most effective when disseminated a.s a smoke, but when atomized, either by explosion or disUUation, it readily penetrates the gas-mask canister unless fittt with the most efficient type of dust filter. Such filters have been devel-ofwy all modern annies but they always increase the breathing resist-. mce of the canister and add to the difficulty of securing adequate protection. 

The smoke thus produced is only one-half as dense as sulfur trioxide smokes, but is less corrosive and far more penetrant to the gas-mask canisters used during the w ar. For this last reason tin tetrachloride w as employed principally in mixtures w ith phosgene and chlorpicrin to increase the visibUity and penetrability of the gas cIoucaused other compounds to be substituted toward the end of the w ar. 

Stannic chloride, KJ, Opacite, Smoke-producing agent less dangerous than phosphorus. Liquid, bp 114°C, fumes in moist air stannic hydroxide and HC1. Less-dense smoke than some but penetrated WWI gas mask canisters. Irritant. Used as a mixture with phosgene and chloropicrin. Very expensive for large-scale use in war. 

Those items (e.g. gas mask canisters, and personnel safety devices such as face shields and safety goggles) which are likely to deteriorate during long storage need to be checked once again before actual use. Some more examples arc electrical spares, catalyst used in reactors, spares of instmmentation, anti-caking agents, etc. If a proper inspection of such items is not done before use, it can result in serious problems in the process plant. 

Put on protective clothing, especially respiratory protection of at least Level G. Be sure your gas mask canister is fresh (seals not broken) and appropriate for the incident. 

Some notable accomplishments in the defensive field were development of impregnite for gasproofing of clothing, improvement of the gas-mask canister to provide against irritant smoke, and development of a fully molded facepiece for the gas mask. ... 

Saul Hormats, Development of the Impregnated Charcoals for U.S. Military Gas Mask Canisters. TDMR 1201, 13 Feb 46. 

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