p-Dichlorobenzene

  • Paracide
  • para-Dichlorobenzene
  • 1,4-Dichlorobenzene
  • Dichloricide
  • PDCB
Formula
C6H4Cl2
Structure
Description
White or colorless crystals with a penetrating, distinctive, camphor odor.
Uses
Insecticidal fumigant, popular for domestic use against clothes moths.

Registry Numbers and Inventories.
CAS
106-46-7
EC (EINECS/ELINCS)
203-400-5
EC Index Number
602-035-00-2
EC Class
Irritant; Dangerous for the Environment
R 36 50/53
S 24/25 46 60 61
RTECS
CZ4550000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Human Data; Primary Irritant
UN (DOT)
1592
Merck
13,3082
Beilstein/Gmelin
1680023
Beilstein Reference
4-05-00-00658
RCRA
U072
EPA OPP
61501
Swiss Giftliste 1
G-1524
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
48 - 50
Boiling point, °C
173.4
Vapor pressure, mmHg
0.65 (20 C)
Vapor density (air=1)
5.07
Saturation Concentration
1267-1681 ppm (0.13-0.17%)
Odor Threshold Odor threshold 15-30 ppm
Critical temperature
407.5
Critical pressure
40.6
Density
1.458 g/cm3 (20 C)
Solubility in water
80 mg/L
Viscosity
0.839 cp (55 C)
Surface tension
31.4 g/s2 (60 C)
Refractive index
1.5285 (20 C)
Partition coefficient, pKow
3.44
Heat of fusion
18.14 kJ/mol
Heat of vaporization
49.92 kJ/mol
Heat of combustion
-2936 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry, well-ventilated area away from incompatible substances.
B3 D2A
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Do not get on skin or in eyes. Do not ingest or inhale. 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 impervious gloves. 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
Wear a self contained breathing apparatus and appropriate Personal protection. (See Exposure Controls, Personal Protection section). Remove all sources of ignition. Carefully scoop up and place into appropriate disposal container.
Disposal code
3
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Aluminum, oxidizing agents.
Decomposition
Hydrogen chloride, chlorine, carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
66
Autoignition, °C
> 500
Upper exp. limit, %
7.8
Lower exp. limit, %
1.8
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Dusts at sufficient concentrations can form explosive mixtures with air. Use water spray to keep fire-exposed containers cool. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
Fire potential
Moderate; flammable hazard when exposed to heat, flame or oxidizers.
Hazards
Containers may explode when heated.
Combustion products
Vapors are irritating. chlorine, hydrogen chloride, and phosgene gases may be generated in fires.
Health
2
 
Flammability
2
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OSHA PEL: TWA 75 ppm (450 mg/m3) NIOSH REL: Ca See Appendix A NIOSH IDLH: Potential occupational carcinogen 150 ppm
Carcinogin
G-A3, I-2B, N-2, CP65
Poison_Class
4
Exposure effects
Overexposure may cause delayed kidney injury. Possible cancer hazard based on tests with laboratory animals. Chronic ingestion may cause liver damage. May cause anemia and other blood cell abnormalities.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause liver and kidney damage.
   Inhalation
May cause respiratory tract irritation. May cause liver and kidney damage.
   Skin
May cause skin irritation.
   Eyes
Exposure to solid may cause pain and redness. Exposure to high vapor concentrations may cause irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
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
1592
Response guide
Hazard class
6.1
Packing Group
I
 
USCG CHRIS Code
DBP
 
36 Halogenated hydrocarbons
HS Code
2903 61 00
 
Std. Transport #
4915134
 
IMO Pollution Category
B
IMO Hazard code
S/P