4-Vinyltoluene

  • p-Methyl styrene
  • 1-Ethenyl-4-methylbenzene
  • p-Vinyl toluene
  • 4-Methylstyrene
Formula
C9H10
Structure
Description
Colorless liquid, strong, disagreeable odor.
Uses
Use in mixtures with other vinyltoluene isomers (3-vinyltoluene) as monomers for producing poly(vinyltoluene).

Registry Numbers and Inventories.
CAS
622-97-9
EC (EINECS/ELINCS)
210-762-8
EC Class
flammable
R 10 20 36/37/38
RTECS
WL5076000
RTECS class
Tumorigen; Mutagen
UN (DOT)
2618
Beilstein/Gmelin
1209317
Beilstein Reference
4-05-00-01369
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C9H10
Formula mass
118.18
Melting point, °C
-34
Boiling point, °C
173
Vapor pressure, mmHg
2
Vapor density (air=1)
4.1
Saturation Concentration
2382 ppm (0.2%) at 25 C (calculated)
Critical temperature
396
Critical pressure
32.60
Density
0.9383 g/cm3 (0 C)
Solubility in water
Slightly soluble
Viscosity
0.0020986 pa-s @ 239.02 K
Surface tension
0.043227 newtons/m @ 239.02 K
Refractive index
1.5393 (25 C)
Partition coefficient, pKow
3.35
Heat of vaporization
45.43 kJ/mol
Heat of combustion
-5089 kJ/mol

Hazards and Protection.
Storage
Outside or detached storage is preferred. Store in a cool, dry, well-ventilated location. Store away from heat, oxidizing materials, and sunlight. Separate from acids, oxidizing materials, peroxides, and metal salts.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Any supplied-air respirator with a full facepiece and operated in a pressure-demand or other positive pressure mode.<BR> For emergency or planned entry in unknown concentrations or IDLH conditions, use any self-contained breathing apparatus with a full facepiece and operated in a pressure-demand or other positive pressure mode.
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash, cement powder, or commercial sorbents. Apply universal gelling agent to immobilize spill. Apply approriate foam to diminish vapor and fire hazard. Water spill: Use natural barriers or oil spill control booms to limit spill travel. Use surface active agent (e.g. detergent, soaps, alcohols), if approved by epa. Inject universal gelling agent to solidify encircled spill and increase effectiveness of booms.
Stability
The substance may polymerize due to warming with fire or explosion hazard.
Incompatibilities
May react vigorously with strong oxidizing agents May react exothermically with reducing agents to release hydrogen gas.
Decomposition
Oxides of carbon.

Fire.
Flash Point,°C
45
Autoignition, °C
575
Upper exp. limit, %
6.1
Lower exp. limit, %
1.9
Fire fighting
Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may spread fire. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use foam, dry chemical, or carbon dioxide.
Fire potential
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
Hazards
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.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
2
 
 
Reactivity
2
 

Health.
Exposure limit(s)
TLV: 50 ppm; 242 mg/m3 (as TWA); 100 ppm; 483 mg/m3 (as STEL) (ACGIH 1996).
Exposure effects
Central nervous system depression occurs in serious exposures.
   Ingestion
Styrene sickness with nausea, vomiting, and a sensation of drunkenness occurs with inhalation exposure.
   Inhalation
Irritation of the respiratory tract and occupational asthma may occur. Pulmonary edema has been reported in animals.
   Skin
May irritate or burn. May cause toxic effects if absorbed through the skin.
   Eyes
See Skin.

First aid
 
   Ingestion
Do not induce emesis - dilution: following ingestion and/or prior to gastric evacuation, immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 15 ml/kg in a child). The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility. A thorough ophthalmic examination should be done if visual symptoms are present.

Transport.
UN number
2618
Response guide
Hazard class
3
Packing Group
III
 
USCG CHRIS Code
VNT
 
13 Vinyl acetate
HS Code
2902 90 50
 
Std. Transport #
4912009
 
IMO Chemical Code
17
IMO Pollution Category
A
IMO Hazard code
S/P