Mask, gas

Storage, Shipping, and Handling. Phosphoms pentachloride is in the EPA extreme ha2ardous substance Hst. It is treated as a dammable sohd, and containers in which it is stored or shipped must be affixed with a yellow acid label DOT UN No. 1806. In general, the pentachloride should be handled with the same precautions that are used with the trichloride. Protective clothing should be worn by workers handling the pentachloride and gas masks should be used when personnel are exposed to the vapors. 

Succinic acid and anhydride should be handled with mbber or plastic gloves safety goggles and a dust filter are recommended when handling the products in powder form. A full-face gas mask with a type A (brown) filter cartridge should be worn when handling molten products. 

Ethylene dibromide is a suspected human carcinogen and worker exposure by all routes should be carefiiUy controUed to levels as low as reasonably achievable (67). Ethylene dibromide causes severe blistering of the skin if contact is prolonged. Eye contact with the Hquid will cause pain, irritation, and temporary impairment of vision. Recommended safety equipment includes safety goggles, a NIOSH approved canister-type gas mask for organic vapors, neoprene gloves, and neoprene overshoes. In case of contact with ethylene dibromide, contaminated clothing and shoes should be removed and eyes or skin washed with plenty of water for at least 15 minutes. Contaminated clothes should be washed before reuse and contaminated shoes should be discarded. 

Oxidation. Carbon monoxide can be oxidized without a catalyst or at a controlled rate with a catalyst (eq. 4) (26). Carbon monoxide oxidation proceeds explosively if the gases are mixed stoichiometticaHy and then ignited. Surface burning will continue at temperatures above 1173 K, but the reaction is slow below 923 K without a catalyst. HopcaUte, a mixture of manganese and copper oxides, catalyzes carbon monoxide oxidation at room temperature it was used in gas masks during World War I to destroy low levels of carbon monoxide. Catalysts prepared from platinum and palladium are particularly effective for carbon monoxide oxidation at 323 K and at space velocities of 50 to 10, 000 h . Such catalysts are used in catalytic converters on automobiles (27) (see Exhaust CONTHOL, automotive). 

Prevention of carbon monoxide poisoning is best accompHshed by providing good ventilation where contamination is a problem. If good ventilation is not possible, a self-contained breathing apparatus, such as a Scott Air-Pak, must be used. The use of gas masks containing an adsorbent is generally not recommended since it is difficult to know when the adsorbent is exhausted. 

Although GB is also effective by penetration through the skin, the dose required to produce toxic effects by this route is high. Thus a person wearing skin covering and a gas-mask is reasonably well protected. 

Entry into a tank that has contained any chlorinated or any easily evaporated solvent requires special procedures to ensure worker safety. The heavier vapors tend to concentrate in unventilated spaces. The proper tank entry procedure requires positive ventilation, testing for residue solvent vapor and oxygen levels, and the use of respiratory equipment and rescue harness. Monitoring the tank from outside is also important. The use of an appropriate gas mask is permissible in vapor concentrations of less than 2% and when there is no deficiency of atmospheric oxygen, but not for exposures exceeding one-half hour. Skin exposure to 1,1,1-trichloroethane can cause irritation, pain, bHsters, and even burning. Eye exposure may produce irritation, but should... 

Skin Absorption. Normal skin absorbs HCN slowly. However, 2% HCN in air may cause poisoning in 3 min, 1% is dangerous in 10 min, and 0.05% may produce symptoms after 30 min, even though a gas mask or air mask is worn. Some areas of the body, such as the feet and mucous membranes, are more absorptive than others. Cuts and abrasions absorb cyanide rapidly, and 50 mg of HCN absorbed through the skin can be fatal. 

Protective clothing, goggles, face shields, hard hats, work gloves, rubber gloves, aprons, hoods, gas masks (with spare canisters), and self-contained breathing apparatus on hand... 

Highly irritating and poisonous Very soluble in water. Liquid liberates heat as it dissolves in water. The entrapment of water in an anhydrous hydrogen fluoride cylinder can cause rapid generation of heat and pressure which can lead to an explosion. Containers should never be heated to >52°C. A liquid hydrogen fluoride spill area should not be entered unless protective clothing (impervious to the compound) and a self-contained gas mask are worn Fumes in air... 

Health Hazards Information - Recommended Personal Protective Equipment Self-contained breathing equipment, air-line mask, or industrial canister-type gas mask rubber-coated gloves, apron, coat, overalls, shoes Symptoms Following Exposure Inhalation of fumes results in coughing and choking sensation, and irritation of nose and lungs. Liquid causes bums General Treatment for Exposure ... 

Health Hazards Information - Recommended Personal Protective Equipment Full protective clothing gas mask or self-contained breathing apparatus Symptoms Following Exposure Inhalation causes irritation of respiratory system, pulmonary edema, and systemic effects. Vsqrar irritates eyes. Liquid causes severe burns of eyes and severe irritation or burns of mouth and stomach General Treatment... 

Atem-einsatz, m. drum (of a German mask), -gerat, n. = Atmungsgerat. -maske, /. gas mask, respirator, -rohr, n -rijhre, /. breathing tube, respiratory tube, -zug, m. breath, aterisch, a. ethereal. 

Filter-vorsatz, m. air filter (in a gas mask), -wager, m. filter weigher, -watte, /. filter wadding, -zelle,/. filter cell, filter unit. 

Mund-loch, n, mouth, orifice (Expl.) fuse hole, -schlcht, /, chemical layer (in a gas mask), -schleim, m. oral mucus, -schlelmhaut, /. mucous membrane of the mouth, -speichel,... 

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