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Reference.org
Diphosgene
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<p>Diphosgene is an organic <a href="/facts/Chemical_compound/37FXqqtv">chemical compound</a> with the formula ClCO2CCl3. This colorless liquid is a valuable reagent in the <a href="/facts/Organic_synthesis/aprl6Iq7">synthesis</a> of organic <a href="/facts/Chemical_compound/37FXqqtv">compounds</a>. Diphosgene is related to <a href="/facts/Phosgene/Adeazsck">phosgene</a> and has comparable <a href="/facts/Toxic/qa96rs60">toxicity</a>, but is more conveniently handled because it is a liquid, whereas phosgene is a gas. </p>