2,4-Dichlorophenol

  • 2,4-DCP
Formula
C6H4Cl2O
Structure
Description
Colorless crystalline solid with a medicinal odor.
Uses
In synthesis of antihelminthic bithionol sulfoxide, pesticide.

Registry Numbers and Inventories.
CAS
120-83-2
EC (EINECS/ELINCS)
204-429-6
EC Index Number
604-011-00-7
EC Class
Toxic; Harmful; Corrosive; Dangerous for the Environment
R 21/22 34 51/53
S 26 36/37/39 45 61
RTECS
SK8575000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
2021
Merck
13,3098
Beilstein/Gmelin
742467
Beilstein Reference
4-06-00-00885
RCRA
U081
Swiss Giftliste 1
G-2223
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C6H4Cl2O
Formula mass
163.00
Melting point, °C
40 - 41
Boiling point, °C
210
Vapor pressure, mmHg
0.14 (25 C)
Vapor density (air=1)
5.62
Odor Threshold Odor threshold 0.21 ppm
Critical temperature
473
Critical pressure
50.1
Density
1.40 g/cm3 (20 C)
Solubility in water
5 g/L
Dipole moment
1.59 D
pKa/pKb
8.05 (pKa)
Partition coefficient, pKow
3.06
Heat of vaporization
46.5 kJ/mol
Heat of combustion
-2754 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container.
D1A E
Handling
Wash thoroughly after handling. Use only in a well ventilated area. 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.
Disposal code
3
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents, acid chlorides, acid anhydrides.
Decomposition
Hydrogen chloride, carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
114
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Slightly flammable. Requires preheating. Fire hazard when in contact with acid or acid fumes.
Hazards
Fire extinguishing agents: Water or foam may be used even though frothing occurs.
Combustion products
Toxic gases can be evolved.
Health
3
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
3
Exposure effects
Abnormally low blood pressure, reduced body temperature, rapid breathing, and rapid heart rate may develop with severe toxicity. Initial CNS excitation, including seizures, is commonly followed by CNS depression ranging from lethargy to coma and death. Fetotoxicity and skeletal abnormalities have been reported in animal experiments.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
May cause 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.
   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
2021
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
DCP
 
21 Phenols, Cresols
HS Code
2908 10 00
 
IMO Chemical Code
17
IMO Pollution Category
A
IMO Hazard code
S/P