Hexachlorobenzene

  • Perchlorobenzene
  • Pentachlorophenyl chloride
Formula
C6Cl6
Structure
Description
A white crystalline substance.
Uses
In organic syntheses, fungicide.

Registry Numbers and Inventories.
CAS
118-74-1
EC (EINECS/ELINCS)
204-273-9
EC Index Number
602-065-00-6
EC Class
Carcinogenic Category 2; Toxic; Dangerous for the Environment
RTECS
DA2975000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Human Data
UN (DOT)
2729
Merck
12,4714
Beilstein/Gmelin
1912585
Beilstein Reference
4-05-00-00670
RCRA
U127
EPA OPP
61001
Swiss Giftliste 1
G-10483
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C6Cl6
Formula mass
284.78
Melting point, °C
2.045
Boiling point, °C
332
Vapor pressure, mmHg
5E-5 (25 C)
Vapor density (air=1)
9.83
Critical temperature
552
Critical pressure
28.1
Density
2.045 g/cm3
Solubility in water
Insoluble
Refractive index
1.5691 (23 C)
Partition coefficient, pKow
5.73
Heat of vaporization
81.30 kJ/mol
Heat of combustion
-2131 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. 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 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Dimethyl formamide.
Decomposition
Hydrogen chloride, carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
242
Upper exp. limit, %
6.7
Lower exp. limit, %
3.5
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. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Flammable.
Hazards
Containers may explode when heated.
Combustion products
They contain highly toxic chloride fumes.

Health.
Exposure limit(s)
2 µg/m3 TLV
Carcinogin
G-A3, I-2B, N-2, CP65
Poison_Class
1*
Exposure effects
May cause liver and kidney damage. Repeated contact may result in skin burns. Chronic exposure may cause enlarged thyroid, lymph nodes, skin photosensitization and abnormal growth of body hair.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
May cause respiratory tract irritation.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   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.
   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. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
2729
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
HCZ
 
Std. Transport #
4925191