o-Dichlorobenzene

  • 1,2-Dichlorobenzene
  • o-Dichlorobenzol
Formula
C6H4Cl2
Structure
Description
Colorless to pale yellow liquid, pleasant aromatic odor.
Uses
Herbicide.

Registry Numbers and Inventories.
CAS
95-50-1
EC (EINECS/ELINCS)
202-425-9
EC Index Number
602-034-00-7
EC Class
Harmful; Irritant; Dangerous for the Environment
R 22 36/37/38 50/53
S 23 60 61
RTECS
CZ4500000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
1591
Merck
13,3081
Beilstein/Gmelin
606078
Beilstein Reference
4-05-00-00654
RCRA
U070
EPA OPP
59401
Swiss Giftliste 1
G-3644
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C6H4Cl2
Formula mass
147.00
Melting point, °C
-17
Boiling point, °C
180.5
Vapor pressure, mmHg
3 (30 C)
Vapor density (air=1)
5.1
Saturation Concentration
0.1% at 20 C
Evaporization number
0.8 (n-butyl acetate = 1)
Odor Threshold Odor threshold 50 ppm
Critical temperature
417.2
Critical pressure
39.8
Density
1.309 g/cm3 (20 C)
Solubility in water
100 mg/L
Viscosity
1.324 cp at 25C
Surface tension
36.61 g/s2
Refractive index
1.5515 (20 C)
Dipole moment
2.27 D (24 C)
Dielectric constant
9.9 (25 C)
Partition coefficient, pKow
3.43
Heat of fusion
12.93 kJ/mol
Heat of vaporization
50.23 kJ/mol
Heat of combustion
-2964 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
B3 D1B
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Ground and bond containers when transferring material. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation.
Disposal code
2
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Strong oxidizing agents, acids, aluminum.
Decomposition
Hydrogen chloride, chlorine, carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
66
Autoignition, °C
640
Upper exp. limit, %
12
Lower exp. limit, %
2.2
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Combustion generates toxic fumes. Use water spray to keep fire-exposed containers cool. To extinguish fire, use water fog, dry chemical, carbon dioxide, or regular foam. Use agent most appropriate to extinguish fire. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
Slight; moderate when exposed to heat or flame.
Hazards
Poisonous gases are produced in fire
Combustion products
Poisonous vapors including hydrogen chloride gas, chlorocarbons, chlorine
Health
2
 
Flammability
2
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: C 50 ppm (300 mg/m3) OSHA PEL: C 50 ppm (300 mg/m3) IDLH 200 ppm
Poison_Class
4
Exposure effects
Prolonged or repeated exposure may cause adverse reproductive effects. May cause liver and kidney damage. May cause fetal effects.
   Ingestion
Harmful if swallowed. May cause central nervous system depression, kidney damage, and liver damage.
   Inhalation
May cause respiratory tract irritation. May cause liver and kidney damage. May cause drowsiness, unconsciousness, and central nervous system depression.
   Skin
Causes irritation with burning pain, itching, and redness.
   Eyes
Contact produces irritation, tearing, and burning pain. Vapors cause eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. 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 immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1591
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
DBO
 
36 Halogenated hydrocarbons
HS Code
2903 61 00
 
Std. Transport #
4925203
 
IMO Chemical Code
17
IMO Pollution Category
B
IMO Hazard code
S/P