So, here's the deal on Diacetyl. Look it up in and HAZMAT guide book and you get a few warnings. NONE of which are that bad. Staight out of the Emergency Guide Book from the PHMSA.gov website...
"Diacetyl 127 2346 (not green)
HAZARDS FOR 127...
FIRE OR EXPLOSION
• HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
• Vapors may form explosive mixtures with air.
• Vapors may travel to source of ignition and flash back.
• Most vapors are heavier than air. They will spread along ground and collect in low or confined areas
(sewers, basements, tanks).
• Vapor explosion hazard indoors, outdoors or in sewers.
• Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
• Runoff to sewer may create fire or explosion hazard.
• Containers may explode when heated.
• Many liquids are lighter than water.
HEALTH
• Inhalation or contact with material may irritate or burn skin and eyes.
• Fire may produce irritating, corrosive and/or toxic gases.
• Vapors may cause dizziness or suffocation.
• Runoff from fire control may cause pollution.
PUBLIC SAFETY
• CALL EMERGENCY RESPONSE Telephone Number on Shipping Paper first. If Shipping Paper not
available or no answer, refer to appropriate telephone number listed on the inside back cover.
• As an immediate precautionary measure, isolate spill or leak area for at least 50 meters (150 feet) in all
directions.
• Keep unauthorized personnel away.
• Stay upwind.
• Keep out of low areas.
• Ventilate closed spaces before entering.
PROTECTIVE CLOTHING
• Wear positive pressure self-contained breathing apparatus (SCBA).
• Structural firefighters’ protective clothing will only provide limited protection."
Just thought I would share.