Safety & Environmental Protection (Deck) USCG Question #622 (Set 18)

You have carbon tetrachloride as part of the cargo. If a fire breaks out in the general area, what is the major danger from the carbon tetrachloride?

Official USCG Answer & Rule Citation

Correct Answer: Option D — Phosgene gas may be formed if it comes in contact with hot metal.

Carbon tetrachloride, when exposed to hot metal or open flames during a fire, decomposes thermally to produce highly toxic phosgene gas, posing a severe inhalation hazard to firefighting personnel in enclosed marine spaces.

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