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Question:
Phosgene (CAS 75-44-5) is an important industrial precursor for polyurethanes and various other compounds. It was also used as a chemical weapon in World War II, and is a common hazard in many industrial plants. Download a safety data sheet (SDS) for phosgene from Sigma-Aldrich or another reputable website.
a. Based on the SDS, draw an NFPA diamond diagram for this compound (a color print is not required, as long as the hazard classes are in the correct order).
b. List the major health hazards which might be expected for everyday work with phosgene.
c. What is the TLV-TWA for phosgene? Note: Because it is a hazardous gas, phosgene is often sold as a solution in toluene - don't confuse the TWA for phosgene with the TWA for the toluene solvent.
d. What symptoms would you expect to observe if a co-worker was exposed to phosgene concentrations above the TLV-C? Would you need any special protective equipment to rescue your co-worker? If you're unfamiliar with the medical terms, you should learn what they mean (Wikipedia?)
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