GC: n

S: EPA – http://www.epa.gov/ttnatw01/hlthef/phosgene.html (last access: 4 December 2014); CDC –http://emergency.cdc.gov/agent/phosgene/basics/facts.asp (last access: 4 December 2014); EncBrit.

N: 1. phosgene (n): from latin phos «light,» contraction of phaos «light, daylight» (related to phainein «to show, to bring to light) + generator «person or thing that generates,»from Latin generator «a begetter, producer,» agent noun from past participle stem of generare.
2. A highly toxic, colorless gas that condenses at 0°C to a fuming liquid; used as a war gas and in manufacture of organic compounds.
3. Phosgene is extremely toxic by acute (short-term) inhalation exposure. Severe respiratory effects, including pulmonary edema, pulmonary emphysema, and death have been reported in humans.

S: 1. OED – http://www.etymonline.com/index.php?allowed_in_frame=0&search=phos&searchmode=none; http://www.etymonline.com/index.php?allowed_in_frame=0&search=generator&searchmode=none (last access: 4 December 2014). 2. TERMIUMPLUS. 3. EPA – http://www.epa.gov/ttnatw01/hlthef/phosgene.html (last access: 4 December 2014).

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CR: chlorine