p-Chlorobenzoyl peroxide

  • di-(4-Chlorobenzoyl)peroxide
  • bis(4-Chlorobenzoyl) peroxide
  • p,p'-Dichlorodibenzoyl peroxide
  • Cadox PS
Formula
C14H8Cl2O4
Structure
Description
Odorless white solid or paste.
Uses
Bleaching agent, polymerization catalyst.

Registry Numbers and Inventories.
CAS
94-17-7
EC (EINECS/ELINCS)
202-310-3
RTECS
SD7875000
RTECS class
Other
UN (DOT)
2114, 2115
Beilstein/Gmelin
1915514
Beilstein Reference
4-09-00-00984
Swiss Giftliste 1
G-6315
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C14H8Cl2O4
Formula mass
311.12
Melting point, °C
137-138
Boiling point, °C
427
Vapor pressure, mmHg
2E-7 (25 C)
Odor Threshold Odor threshold Odorless
Density
>1.1 g/cm3 (20 C)
Solubility in water
Insoluble
Partition coefficient, pKow
5.00
Heat of vaporization
68.2 kJ/mol
Heat of combustion
-6440 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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 gloves, clothing 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
No data.
Incompatibilities
Organic compounds can ignite on contact with concentrated peroxides, strongly reduced material such as sulfides, nitrides, and hydrides

Fire.
Flash Point,°C
174
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
Toxic chlorinated biphenyls are formed in fires.
 
Special
O

Health.
Poison_Class
4
Exposure effects
   Ingestion
See Skin.
   Inhalation
Causes irritation.
   Skin
May cause severe injury or burns.
   Eyes
See Skin.

First aid
 
   Ingestion
Immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 4 ounces/120 ml in a child).
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists. Vitamin e may be of use in therapy.
   Eyes
Wash with water for at least 15 min.; consult a doctor.

Transport.
UN number
2114, 2115
Response guide
Hazard class
5.2
USCG CHRIS Code
DZP