p-Chlorobenzoic acid

  • 4-Chlorobenzoic acid
  • Chlorodracylic acid
Formula
C7H5ClO2
Structure
Description
Triclinic crystals or light fluffy white powder.
Uses
Chemical intermediate for m-chlorophenol.

Registry Numbers and Inventories.
CAS
74-11-3
EC (EINECS/ELINCS)
200-805-9
EC Class
harmful
R 22 36/37/38
S 26 36/37/39
RTECS
DG4976010
RTECS class
Drug
Merck
13,2144
Beilstein/Gmelin
907196
Beilstein Reference
4-09-00-00973
Swiss Giftliste 1
G-9414
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C7H5ClO2
Formula mass
156.57
Melting point, °C
123
Boiling point, °C
287
Vapor pressure, mmHg
0.0012 (25 C)
Vapor density (air=1)
5.4
Density
1.535 g/cm3
Solubility in water
Very soluble
pKa/pKb
4.03 (pKa)
Partition coefficient, pKow
2.65
Heat of fusion
34.3 kJ/mol
Heat of vaporization
55.6 kJ/mol
Heat of combustion
-3066 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
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. Do not ingest or inhale.
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
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
Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
4
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong bases.
Decomposition
Hydrogen chloride, carbon monoxide, carbon dioxide, chloride fumes.

Fire.
Flash Point,°C
127
Autoignition, °C
545
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.
Health
1
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
Seizures have been reported to occur in animals receiving lethal doses.
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. The toxicological properties of this substance have not been fully investigated.
   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.
   Eyes
Causes eye irritation.

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. 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 immediately.

Transport.
HS Code
2916 39 00