Acetylene

Acetylene (ethyn, identical CH=CH) - hydrocarbon. In normal conditions acetylene gas with weak smell (sharp garlic smell technical acetylene caused by impurities), explosive when mixed with air. Acetylene has a slight narcotic effect, causing suffocation due to the reduced partial oxygen in the air we breathe. Apply for autogenous welding (see weldingand cutting of metals, and as a source of product upon receipt of synthetic rubber.
Production poisoning acetylene due to the contained substances (hydrogen phosphide, arsenic, hydrogen, se hydrogen, ammonia, carbon monoxide, and others) most often occur autogenous welding, especially in confined spaces (boilers).
At long influence of acetylene noted the increase in the concentration of hemoglobin in blood, reticulocytosis, radiation and relative lymphocytes, bronchitis, pneumonia and pulmonary edema, degenerative changes in the liver.
Symptoms of acute poisoning: agitation, alternating with depression, in the presence of impurities convulsions, paralysis; possible death.
First aid at acute poisoning acetylene: artificial respiration, inhalation of oxygen with 3-5% admixture CO2, warm body, intravenous solution of glucose, symptomatic treatment.
Prevention of poisoning: ventilation of premises, individual protection - mask of the brand And, in poorly ventilated areas - hose gas masks, the control over concentration of the acetylene in the work premises, permanent monitoring of the technical condition of equipment. Cm. the industrial Poisons.

Acetylene (a synonym for Eten; CH = CH) the first member of a number of unsaturated hydrocarbons with the General formula: CnH2n-2 degrees
Mol. weight to 26.04, beats. weight (with temperature Kip) - of 0.565, water vapor (at temperature of 20 degrees) - 32 528 ml RT. senior solubility in water (temperature of 20 degrees)-1,118, in human blood (at temperature of 37.5 degrees) - 0,841. It is soluble in acetone, very explosive; when the pressure increases explosion hazard increases. Chemically pure acetylene has a faint odor of ether; technical has an unpleasant garlic smell caused by impurities (phosphine, Arsin, hydrogen sulfide and other).
Apply for acetylene autogenous acetylene welding and cutting of metals, lighting, for synthetic rubber, tetrachlorethane, tetrachloroethylene, and other Chemically pure A. - weakly toxic narcotic effect. Poisoning them rare and occur mainly in accidents. If the air contains 10% A., there was a mild degree of poisoning, with 30% disorder coordination and speech; when the content in the air more than 30% acetylene can develop asphyxia. 60% of the mixture A. with air (nancylen) is used for anesthesia.
Possible professional intoxication A. from impurities contained in the technical A. with the Best hygienic and technical points of view is getting acetylene generators system carbide on the water", in which CAC2 periodically, individual portions, one arrives in the large volume of water; A. cleared from the very water soluble gases, ammonia, siliceous hydrogen and mostly from H2s Acetylene must be cleaned. As cleaners use bleach, chromic acid or geritol (infuzoria the earth is soaked with a solution dvuhromovokislyj potassium and sulphuric acid), which impurities are oxidized.
Health activities in the production of acetylene, storage of calcium carbide special instructions. Great attention is given to the prevention of acetylene explosion and fire.
For prevention of poisoning should carefully monitor the integrity of the equipment and communications, cleaning A. from impurities. Of great importance in the acquisition and application of A. has ventilation. Individual means of protection in case of accidents is filtering gas mask: if necessary protection A. with an impurity of phosphorus and arsenic hydrogen is a gas mask mark "E" (with a black box), in the presence of nitrogen oxides and hydrogen sulphide gas mask brand "b" (with the yellow box). When working in cramped, poorly ventilated areas it is advisable to use hose gas masks or masked PSH-2, the AAA-5 with forced air supply. Cm. also Poisoning.