COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

Material Safety Data Sheet No. 674 from Genium's Reference Collection ISOBUTYLENE Genium Publishing Corporation 1145 Cataln Street Issued: November 1988 Schenectady,NY 122303-1836 USA (518)377-8855 GENIUM PUBLISHING CORP. SECTIO D ........ ....................... FICATION Material Name: ISOBUTYLENE 4 Description(Origin/Uses): Obtained from refinery steams by absorption on 65%sulfuric acid(H2SO,) 1 0 at 59T(15°C).Used primarily to produce diisobutylene,trimers,butyl rubber,and other polymers;also used to produce antioxidants for foods,plastics,and packaging food supplements. NFPA HMIS Other Designations: Isobutene;2-Methylpropene;gamma-Butylene;CH2=C(CH)2;CAS No.0115-11-7 H 1 R 1 F 4 I 1 Manufacturer: Contact your supplier or distributor.Consult the latest edition of the Chemicahveek R 0 S 1 Buyers'Guide(Genium ref.73)for a list of suppliers. PPG* *See sect.8 K 4 SECTION Z,:INGREDIENTS AND HAZARDS EXPOSURE' is:.1IMI Isobutylene,CAS No.0115-11-57 Ca 100 OSHA PEL None Established ACGIH TLV,1988-89 None Established NIOSH REL None Established Toxicity Data* Rat,Inhalation,L.0.,: 620 g/m'(4 Hrs) * Mouse,Inhalation,LC.: 415 ghn'(2 Hrs) Monitor NIOSH,RTECS(UD0890000),for additional data. ,: SECTION .. :::PHYSICAL :DATA. ....... Boiling Point: -19.6°F(-6.9°C) Molecular Weight: 56 Grams/Mole Melting Point: -220T(-140°C) Solubility in Water(%): Insoluble* Vapor Density(Air=1): 1.9 %Volatile by Volume: 100 Specific Gravity(H2O=1): Ca 0.6 Appearance and Odor: A colorless,extremely flammable gas;odor not listed. *Isobutylene is very soluble in alcohol,ether,and sulfuric acid. SECTION 4 .;:FIRE AND::::. EXPLOSION :DATA Flash Point* Autoi nition Temperature: 869T(465°C) LEL: 1.8%v/v UEL: 9.6%v/v Extinguishing Media: Isobutylene gas is an extremely flammable gas that has a substantial explosive air-gas range.For isobutylene fires, the recommended fire-fighting technique is to stop the flow of gas instead of extinguishing the fire.If the flames are extinguished and the isobutylene gas continues to escape or leak,an explosive air-gas mixture can form quickly and ignite without warning.A resulting explosion could cause greater damage than that which would be caused by allowing the fire to bum itself out.If the fire must be extinguished to allow safe access to shutoff valves,recommended extinguishing agents include CO2 and dry chemical.Unusual Fire or Explosion Hazards: In many cases,the preferred strategy is to allow the flames to continue to burn and to cool the surroundings with water spray to prevent ignition of nearby combustibles.Isobutylene gas is heavier than air and can collect in low-lying,confined spaces.Potentially explosive air-gas mixtures are especially likely to build up in such an area,so enter it with extreme caution whether or not it is presently involved in a fire. Possible sources of ignition must not be brought into any area suspected of containing substantial concentrations of isobutylene gas.Special Fire-fighting Procedures: Wear a self-contained breathing apparatus(SCBA)with a full facepiece operated in the pressure-demand or positive-pressure mode. *Sax(Genium ref.6)reports a flash point of-105T(-76°C)for isobutylene. SECTION..5. ..REACTIVITY DATA: Stability/Polymerization: Isobutylene is stable in closed,pressurized containers during routine operations at room temperature. Hazardous polymerization cannot occur.Chemical Incompatibilities: Isobutylene can react dangerously with strong oxidizing materials. Conditions to Avoid: Prevent exposing isobutylene to any source of ignition such as an open flame,sparks,lighted tobacco products,or steam lines.Hazardous Products of Decomposition: Isobutylene fires can produce toxic gases such as carbon monoxide(CO)or lower- molecular-weight hydrocarbons.Comments: The extreme flammability of isobutylene means that any reactions involving this material, including nonhazardous ones,must be performed carefully in order to prevent fires and/or explosions. SECTION 6. HEALTH 'HAZARD INFORMATION Carcinogenicity: Isobutylene is not listed as a carcinogen by the NTP,IARC,or OSHA. Summary of Risks: Isobutylene is a simple asphyxiant.As such it will not cause significant physiological responses,but it can displace the minimum required atmospheric oxygen level.Significant displacement by isobutylene results in an oxygen-deficient atmosphere with no adequate warning properties.Asphyxiation fatalities can occur especially in confined,low-lying,poorly ventilated spaces because isobuty- Copyright C 1988 by Genium Publishing Corporation Any commercial use or reproduction without the publishefs permission is prohibited