C4H6	1010	106-99-0	116	--	Yes	1#	2	4	2
Chemical Formula	UN #	C.A.S. #	ERG . #	Hazardous Substance	Extremely Hazardous Substance	RQ	Health	Fire	Reactivity

Characteristics		Exposure Limits			Common Uses
Appearance:	Colorless gas with mild gasoline like odor	LEL:	2%		Used in manufacture of nylon and synthetic latex paints Also used in manufacture of synthetic rubber
		UEL:	12%
Specific Gravity:	0.65	IDLH:	2000 ppm
Flash Point:	-105øF (liquid)	STEL:	5 ppm
Auto Ignit.:	788øF	PEL:	1 ppm
Vapor Pressure:	2.2 atm	ERPG2:	200 ppm
pH:		ERPG3:	5000 ppm
Emergency Response PPE (Fire Fighters)					Hazards
Respiratory: SCBA or Supplied air Respirator with escape pack.					Teratogenic Reproductive hazard Potential carcinogen Frostbite from liquid Eye/nose/throat irritant
Eye/Face/Body: Chemical protective clothing with flash protective outer suit.
Emergency Medical Actions					Incompatible
Remove from contaminated area, remove contaminated clothing. Respiratory assistance/CPR as needed. Flush with copious amounts of water for 15 minutes. Do not induce vomiting.					Phenol Chlorine dioxide/crotonaldehyde Copper Note: may form explosive peroxides with exposure to air
Notes					Initial and Protective Action Distances
Class 1A Flammable liquid Flammable gas Liquid below 24øF Synonyms: Vinylethylene, Bivinyl, Erythrene					Small Spills <> Eliminate ignition sources Water spray to reduce vapors	Large Spills <> Eliminate ignition sources Consider initial evacuation downwind for 1/2 mile

Emergency Response Actions

Avoid ends of fire exposed containers/vessels. Allow to burn until leak can be stopped. Cool containers as needed from safe distance. Small fire: dry-chem., CO2. Large fire: Foam or water spray. 1/99