4-Methylstyrene
CAS No.: 622-97-9
Synonyms:
Formula: C9H10
Exact Mass: 118.07800
Molecular Weight: 118.17600
PSA: 0.00000
LogP: 2.63800
4-Methylstyrene 622-97-9 MSDS
Name: p-Methylstyrene stabilized 98% Material Safety Data Sheet
Synonym: 4-Vinyltoluene; p-Vinyltoluene; 4-Methylstyrene
CAS: 622-97-9
Section 1 - Chemical Product   MSDS Name:p-Methylstyrene stabilized 98% Material Safety Data Sheet
Synonym:4-Vinyltoluene; p-Vinyltoluene; 4-Methylstyrene

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
622-97-9 p-Methylstyrene 98 210-762-8
Hazard Symbols: None Listed.
Risk Phrases: 10

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Flammable.
Potential Health Effects
Eye:
Causes eye irritation.
Skin:
Causes skin irritation. May cause dermatitis. Contact with the skin defats the skin.
Ingestion:
May cause digestive tract disturbances.
Inhalation:
Causes respiratory tract irritation. May cause drowsiness, unconsciousness, and central nervous system depression. May be harmful if inhaled. Vapors may cause dizziness or suffocation.
Chronic:
Chronic inhalation may cause effects similar to those of acute inhalation.

Section 4 - FIRST AID MEASURES
  Eyes: In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Get medical aid.
Skin:
In case of contact, flush skin with plenty of water. Remove contaminated clothing and shoes. Get medical aid if irritation develops and persists. Wash clothing before reuse.
Ingestion:
If victim is conscious and alert, give 2-4 cupfuls of milk or water.
Never give anything by mouth to an unconscious person. Get medical aid immediately.
Inhalation:
If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician:

Section 5 - FIRE FIGHTING MEASURES
  General Information:
Evacuate area and fight fire from a safe distance. As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors may form an explosive mixture with air. Use water spray to keep fire-exposed containers cool. Flammable liquid and vapor. May be ignited by heat, sparks, and flame. Fire or excessive heat may result in violent rupture of the container due to bulk polymerization. May accumulate static electricity.
Extinguishing Media:
For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Water may be ineffective. Do NOT use straight streams of water.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, observing precautions in the Protective Equipment section. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors. Water spray may reduce vapor but may not prevent ignition in closed spaces.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Use only with adequate ventilation. Keep away from heat, sparks and flame. Avoid breathing vapor or mist. Pure vapor will be uninhibited and may polymerize in vents or other confined spaces.
Storage:
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Flammables-area. Isolate from oxidizing materials and acids.
Inhibitor level should be checked periodically.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Use explosion-proof ventilation equipment. Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate general or local exhaust ventilation to keep airborne concentrations below the permissible exposure limits.
Exposure Limits CAS# 622-97-9: CAS# 1020-31-1: CAS# 25013-15-4: United States OSHA: 100 ppm TWA; 480 mg/m3 TWA Belgium - TWA: 50 ppm VLE; 246 mg/m3 VLE Belgium - STEL: 100 ppm VLE; 490 mg/m3 VLE France - VME: 50 ppm VME; 240 mg/m3 VME Germany: 100 ppm TWA; 490 mg/m3 TWA Malaysia: 50 ppm TWA; 242 mg/m3 TWA Netherlands: 10 ppm MAC; 50 mg/m3 MAC Russia: 50 mg/m3 TWA Spain: 50 ppm VLA-ED; 246 mg/m3 VLA-ED Spain: 100 ppm VLA-EC; 492 mg/m3 VLA-EC Personal Protective Equipment Eyes: Wear chemical splash goggles.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Liquid
Color: clear, colorless
Odor: strong odor - disagreeable odor
pH: Not available.
Vapor Pressure: 1.8 mm Hg @ 25 deg C
Viscosity: Not available.
Boiling Point: 170 - 175 deg C
Freezing/Melting Point: -34 deg C
Autoignition Temperature: 490 deg C ( 914.00 deg F)
Flash Point: 45 deg C ( 113.00 deg F)
Explosion Limits, lower: 0.1% @ 85C
Explosion Limits, upper: 11.0% @ 120C
Decomposition Temperature:
Solubility in water: Insoluble.
Specific Gravity/Density: .8960g/cm3
Molecular Formula: C9H10
Molecular Weight: 118.18

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable. However, it may undergo explosive polymerization if uninhibited.
Conditions to Avoid:
Ignition sources, excess heat.
Incompatibilities with Other Materials:
Strong oxidizing agents, acids, peroxides, aliphatic amines, caustics (e.g. ammonia, ammonium hydroxide, calcium hydroxide, potassium hydroxide, sodium hydroxide), polymerizing initiators, aluminum chloride, alkanolamines, iron chlorides.
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide.
Hazardous Polymerization: May occur.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 622-97-9: WL5076000 CAS# 1020-31-1 unlisted.
CAS# 25013-15-4: WL5075000 LD50/LC50:
CAS# 622-97-9: Oral, mouse: LD50 = 1072 mg/kg; Oral, rat: LD50 = 2255 mg/kg; Skin, rabbit: LD50 = >5 mL/kg.
CAS# 1020-31-1.
CAS# 25013-15-4: Draize test, rabbit, eye: 90 mg Mild; Draize test, rabbit, skin: 100% Moderate; Inhalation, mouse: LC50 = 3020 mg/m3/4H; Inhalation, mouse: LC50 = 29500 mg/m3/4H; Oral, mouse: LD50 = 3160 mg/kg; Oral, rat: LD50 = 2255 mg/kg.
Carcinogenicity:
p-Methylstyrene - Not listed by ACGIH, IARC, or NTP.
3,5-Di-tert-butylpyrocatechol - Not listed by ACGIH, IARC, or NTP.
Vinyl toluene (mixed isomers) - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
 

Section 13 - DISPOSAL CONSIDERATIONS
  Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: VINYLTOLUENES, INHIBITED
Hazard Class: 3
UN Number: 2618
Packing Group: III
IMO
Shipping Name: VINYLTOLUENE, INHIBITED
Hazard Class: 3.3
UN Number: 2618
Packing Group: III
RID/ADR
Shipping Name: VINYLTOLUENES, INHIBITED
Hazard Class: 3
UN Number: 2618
Packing group: III

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: Not available.
Risk Phrases:
R 10 Flammable.
Safety Phrases:
S 16 Keep away from sources of ignition - No
smoking.
WGK (Water Danger/Protection)
CAS# 622-97-9: No information available.
CAS# 1020-31-1: No information available.
CAS# 25013-15-4: No information available.
Canada
CAS# 622-97-9 is listed on Canada's NDSL List.
CAS# 1020-31-1 is listed on Canada's NDSL List.
CAS# 25013-15-4 is listed on Canada's DSL List.
CAS# 622-97-9 is not listed on Canada's Ingredient Disclosure List.
CAS# 1020-31-1 is not listed on Canada's Ingredient Disclosure List.
CAS# 25013-15-4 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 622-97-9 is listed on the TSCA inventory.
CAS# 1020-31-1 is listed on the TSCA inventory.
CAS# 25013-15-4 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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