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Acetylene

Acetylene, or ethyne (C2H2), colorless gas that explodes on contact with air. Acetylene and oxygen are mixed and burned in the oxyacetylene torch, producing an extremely hot flame (up to 6,300°F/3,480°C) used for welding and cutting metals. Acetylene, used to make plastics, rubber, and explosive compounds, is poisonous if inhaled.

See also: Acetone; Calcium carbide.

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