Product Identification

Product Name

Perkadox L

Synonyms

Benzoyl benzenecarboperoxoate
Benzoyl superoxide
Dibenzoyl peroxide

CAS

94-36-0

Formula

C14H10O4

Molecular Weight

242.23

EINECS

202-327-6

RTECS

DM8575000

RTECS Class

Tumorigen; Mutagen; Primary Irritant

Merck

13,1117

Beilstein/Gmelin

984320

Beilstein Reference

4-09-00-01052

EC Index Number

617-008-00-0

EC Class

Explosive; Irritant; Sensitising

Physical and Chemical Properties

Appearance

White, odorless powder.

Solubility in water

Insoluble

Melting Point

103-106

Boiling Point

350

Vapor Pressure

5E-5 (25 C)

Density

1.334 g/cm3 (20 C)

Partition Coefficient

3.46

Heat Of Vaporization

59.4 kJ/mol

Heat Of Combustion

-6550 kJ/mol

Usage

Oxidizing agent in bleaching oils, flour, catalyst in the plastics industry, initiator in polymerization, source of free radicals for industrial processes.

Vapor Density

8.4

Odor threshold

Odorless

Refractive Index

1.543 (20 C)

First Aid Measures

Ingestion

DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician.

Inhalation

IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.

Skin

IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.

Eyes

First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Handling and Storage

Storage

Isolate in well-detached, fire-resistive, cool, well-ventilated building with no other materials included. Explosion venting. No electrical installations or heating facilities. Use original containers.

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.

Hazards Identification

Ingestion

Abdominal pain.

Inhalation

Coughing, sore throat. Irritates eyes, skin and respiratory tract.

Skin

May cause severe injury or burns.

Eyes

Inflammation of the eye may be noted from ocular exposure.

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.

EC Risk Phrase

R 2 36 43

EC Safety Phrase

S 3/7 14 36/37/39

UN (DOT)

2089

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Exposure limit(s)

TLV: ppm; 5 mg/m3 (as TWA) (ACGIH 1993-1994). MAK: ppm; 5 mg/m3; I (1992). MAK: class I (1992). OSHA PEL: TWA 5 mg/m3 NIOSH REL: TWA 5 mg/m3 NIOSH IDLH: 1500 mg/m3

Poison Class

5

Fire Fighting Measures

Flash Point

154

Autoignition

80

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

Very flammable. Decomposition vapors.

Accidental Release Measures

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 and Reactivity

Incompatibilities

May react violently with inorganic or organic acids, alcohols, amines, metallic naphthenates and polymerization accelerators (e.g., N,N-dimethylaniline) May react explosively or violently with dimethyl sulfide, lithium aluminum hydride and aniline.

Stability

Unstable, spontaneously explosive when heated. Highly reactive. Extremely explosion-sensitive to shock, heat, friction.

Combustion Products

Suffocating smoke evolved May explode

Transport Information

UN Number

2089

Hazard Class

5.2