1,2,3,4-Tetrachlorobenzene

  • Benzene, 1,2,3,4-tetrachloro
Formula
C6H2-1,2,3,4-(Cl)4
Structure
Description
White crystalline solid.
Uses
Component of dielectric fluids, synthesis.

Registry Numbers and Inventories.
CAS
634-66-2
EC (EINECS/ELINCS)
211-214-0
EC Class
harmful
R 22 36/37/38
S 26 36/37/39
RTECS
DB9440000
RTECS class
Reproductive Effector
UN (DOT)
2811
Beilstein/Gmelin
1910025
Beilstein Reference
4-05-00-00667
EPA OPP
61101
Swiss Giftliste 1
G-6289
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C6H2Cl4
Formula mass
215.89
Melting point, °C
42 - 45
Boiling point, °C
254
Vapor pressure, mmHg
0.026 (25 C)
Critical temperature
450
Critical pressure
3.3
Density
1.858 g/cm3 (25 C)
Solubility in water
5.92 mg/L (25 C)
Partition coefficient, pKow
4.64
Heat of vaporization
60.84 kJ/mol
Heat of combustion
-2643 kJ/mol

Hazards and Protection.
Storage
Keep containers tightly closed. Store in a cool, dry area away from incompatible substances.
Insufficient information
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Avoid ingestion and inhalation.
Protection
Eyes: Wear safety glasses and chemical goggles if splashing is possible. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Wash area with soap and water. Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
3
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong bases, sodium hydroxide + methanol.
Decomposition
Hydrogen chloride, carbon monoxide, carbon dioxide, chloride fumes.

Fire.
Flash Point,°C
>110
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
This chemical is probably combustible.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. The toxicological properties of this substance have not been fully investigated. May be harmful if swallowed.
   Inhalation
The toxicological properties of this substance have not been fully investigated. Causes irritation of the mucous membrane and upper respiratory tract.
   Skin
Causes skin irritation. The toxicological properties of this material have not been fully investigated.
   Eyes
Causes eye irritation. May cause chemical conjunctivitis.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2811
Response guide
USCG CHRIS Code
CLF
 
36 Halogenated hydrocarbons
HS Code
2903 69 90