Trichlorobenzene

  • Benzene, trichloro
  • Invalon tc
  • Pyranol 1478
  • TCB
  • TCBA
Formula
C6H3Cl3
Structure
Description
A colorless to clear yellowish liquid with a sweet almond-like odor.
Uses
Chemical intermediate, solvent for oil-soluble dyes, degreasing solvent, dielectric fluid, lubricating-oil additive, heat transfer medium.

Registry Numbers and Inventories.
CAS
12002-48-1
EC (EINECS/ELINCS)
234-413-4
UN (DOT)
2321
Beilstein/Gmelin
NA
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C6H3Cl3
Formula mass
181.45
Melting point, °C
17
Boiling point, °C
208-219
Vapor pressure, mmHg
0.2
Vapor density (air=1)
1.460
Density
1.4533-1.459 g/m3
Solubility in water
30 mg/L @ 25 C
Partition coefficient, pKow
4.02-4.19

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
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. Combustion products include corrosive or toxic 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 deep water pockets, excavated lagoons, or sand bag barriers to trap material at bottom. If dissolved, in region of 10 ppm or greater concentration, apply activated carbon at ten times the spilled amount.
Stability
No data.
Incompatibilities
Reacts with strong oxidants.

Fire.
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
May burn but does not ignite readily.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. May polymerize explosively when heated or involved in a fire. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OSHA: Ceiling Limit 5 ppm
Exposure effects
Fetotoxicity and a high incidence of embryolethality were observed in rat studies.
   Ingestion
Irritation or burns of the esophagus or gastrointestinal tract may occur.
   Inhalation
Severe respiratory tract irritation with possible pulmonary edema or lung injury may develop.
   Skin
Skin irritation or burns may be observed. Skin sensitization may occur.
   Eyes
See Inhalation.

First aid
 
   Ingestion
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). Gastric aspiration using a small, flexible tube may be beneficial if done soon after a large ingestion. Potential benefit must be weighed against the risks of perforation or bleeding if significant esophageal irritation or burns are present. Carefully observe patients with ingestion exposure for the development of severe gastrointestinal irritation or burns. Esophagoscopy may be considered to determine the extent of injury in patients with signs of esophageal irritation or burns.
   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. Severe eye irritation may occur and early ophthalmic consultation may be required.

Transport.
UN number
2321
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
CLF
 
36 Halogenated hydrocarbons
Std. Transport #
4925121