Divinylbenzene

  • Vinylstyrene
  • Diethenylbenzene
Formula
C10H10
Structure
Description
Clear pale straw-colored liquid.
Uses
Polymerization monomer for special synthetic rubbers, drying oils, ion-exchange resins, casting resins, polyesters.

Registry Numbers and Inventories.
CAS
1321-74-0
EC (EINECS/ELINCS)
215-325-5
RTECS
CZ9370000
RTECS class
Tumorigen; Mutagen
UN (DOT)
3295
Beilstein/Gmelin
8401422
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C10H10
Formula mass
130.20
Melting point, °C
-87.2
Boiling point, °C
195
Vapor pressure, mmHg
0.7
Vapor density (air=1)
4.48
Odor Threshold Odor threshold 10-60 ppm.
Critical pressure
24.2
Density
0.918 g/cm3 (20 C)
Solubility in water
50 mg/L
Partition coefficient, pKow
3.59

Hazards and Protection.
Storage
Store at below 90 degrees F with inhibitor.
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
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
If you spill this chemical, FIRST REMOVE ALL SOURCES OF IGNITION. Then, use absorbent paper to pick up all liquid spill material. Your contaminated clothing and absorbent paper should be sealed in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with 60-70% ethanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Stability
Reactive at high temperature and pressure. If polymerizes in container, may burst.
Incompatibilities
May react vigorously with strong oxidizing agents Can react exothermically with reducing agents (such as alkali metals and hydrides) to release gaseous hydrogen May react exothermically with both acids and bases.
Decomposition
Oxides of carbon.

Fire.
Flash Point,°C
61
Autoignition, °C
500
Upper exp. limit, %
6.2
Lower exp. limit, %
1.1
Fire fighting
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher.
Fire potential
This chemical is combustible.
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 may produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
2
 
 
Reactivity
2
 

Health.
Exposure limit(s)
TLV: 10 ppm; 53 mg/m3 (ACGIH 1996). NIOSH REL: TWA 10 ppm (50 mg/m3)
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
Redness.
   Eyes
Redness, pain.

First aid
 
   Ingestion
DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
UN number
3295
Response guide
Hazard class
3
Packing Group
I; II; III
 
32. Aromatic hydrocarbons