3-Chloroperbenzoic acid

  • m-Chloroperbenzoic acid
  • m-Chloroperoxybenzoic acid
  • m-Chloroperoxybenzoic acid
  • 3-Chlorobenzenecarboperoxoic acid
  • MCPBA
Formula
C7H5ClO3
Structure
Description
White powder with a slight, pungent odor.

Registry Numbers and Inventories.
CAS
937-14-4
EC (EINECS/ELINCS)
213-322-3
R 5 8 36/37/38
S 17 26 36
RTECS
SD9470000
RTECS class
Tumorigen
UN (DOT)
2755
Beilstein/Gmelin
608317
Beilstein Reference
4-09-00-00972
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C7H5ClO3
Formula mass
172.57
Melting point, °C
88
Boiling point, °C
265
Critical temperature
450
Critical pressure
43.9
Solubility in water
Insoluble
pKa/pKb
7.14 (pKa)
Partition coefficient, pKow
1.68

Hazards and Protection.
Storage
Stable under normal temperatures and pressures.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective clothing, gloves and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). Keep combustibles (wood, paper, oil, etc.) away from spilled material. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Keep substance wet using water spray. Stop leak if you can do it without risk. SMALL SPILLS: Take up with inert, damp, noncombustible material using clean non-sparking tools and place into loosely covered plastic containers for later disposal.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Nickel, iron, manganese oxide, acids, metals and metal compounds, nitrides,combustible and flammable materials, oxidizing agents, reducing agents.
Decomposition
Strong oxidizer. Contact with other material may caues fire. Keep from contact with clothing and other combustible materials.

Fire.
Fire fighting
SMALL FIRES: Water spray or fog is preferred; if water not available use dry chemical, carbon dioxide or regular foam. LARGE FIRES: Flood fire area with water from a distance. Use water spray or fog; do not use straight streams. Move containers from fire area if you can do it without risk. Do not move cargo or vehicle if cargo has been exposed to heat. Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.
Fire potential
May be ignited by heat, sparks or flames. May burn rapidly with flare-burning effect.
Hazards
May explode from heat, shock, friction or contamination. May ignite combustibles (wood, paper, oil, clothing, etc.). May be ignited by heat, sparks or flames. May burn rapidly with flare-burning effect. Containers may explode when heated. Runoff may create fire or explosion hazard.
Combustion products
Chlorine and chlorine oxides.
Health
2
 
Flammability
1
 
 
Reactivity
3
 
 
Special
O

Health.
Exposure effects
   Ingestion
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns. May be harmful if swallowed.
   Inhalation
May cause irritation.
   Skin
May cause irritation.
   Eyes
May cause irritation.

First aid
 
   Ingestion
If conscious, immediately induce vomiting.
   Inhalation
Remove to fresh air. If not breathing, give artificial respiration. If breathing is dificult, give oxygen.
   Skin
Immediately flush eyes with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
2755
Response guide
Hazard class
5.2