Benzoyl peroxide
CAS No.: 94-36-0
Synonyms:
Formula: C14H10O4
Exact Mass: 242.05800
Molecular Weight: 242.22700
PSA: 52.60000
LogP: 2.61540
Benzoyl peroxide 94-36-0 MSDS
Name: Benzoyl Peroxide (Wet) Material Safety Data Sheet
Synonym: Dibenzoyl peroxide; benzoic acid peroxide; benzoyl superoxid
CAS: 94-36-0
Section 1 - Chemical Product   MSDS Name:Benzoyl Peroxide (Wet) Material Safety Data Sheet
Synonym:Dibenzoyl peroxide; benzoic acid peroxide; benzoyl superoxid

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
94-36-0 Benzoyl peroxide 67-75 202-327-6
Hazard Symbols: XI E
Risk Phrases: 2 36 43

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Risk of explosion by shock, friction, fire or other sources of ignition. Irritating to eyes. May cause sensitization by skin contact.Mutagen.
Potential Health Effects
Eye:
Causes eye irritation. Causes redness and pain.
Skin:
Causes skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material.
Prolonged and/or repeated contact may cause defatting of the skin and dermatitis. May be harmful if absorbed through the skin.
Ingestion:
May cause irritation of the digestive tract. May be harmful if swallowed.
Inhalation:
May cause respiratory tract irritation. May be harmful if inhaled.
Chronic:
Laboratory experiments have resulted in mutagenic effects.

Section 4 - FIRST AID MEASURES
  Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
Skin:
Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
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 and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician:

Section 5 - FIRE FIGHTING MEASURES
  General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. This material poses an explosion hazard when dry. This material is an explosion hazard when exposed to heat, mechanical shock, friction or when agitated.
Extinguishing Media:
Use water spray to cool fire-exposed containers. Use water spray, dry chemical, carbon dioxide, or chemical foam. Do NOT use halogenated agents.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Remove all sources of ignition. Provide ventilation. Do not use combustible materials such as paper towels to clean up spill. Use only non-sparking tools and equipment. In the event of spillage, spilled material should be mixed with water-wetted vermiculite, swept up, and placed in a container for immediate disposal. Spilled material not immediately cleaned up may increase the fire hazard due to evaporation of water away from the Benzoyl peroxide.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Keep away from heat, sparks and flame.
Avoid ingestion and inhalation. Use caution when opening. Can explode without warning when caps of old containers are unscrewed.
Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Storage:
Keep away from heat and flame. Do not store in direct sunlight.
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep refrigerated. (Store below 4C/39F.)

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate general or local exhaust ventilation to keep airborne concentrations below the permissible exposure limits.
Exposure Limits CAS# 94-36-0: United Kingdom, WEL - TWA: 5 mg/m3 TWA United Kingdom, WEL - STEL: 15 mg/m3 STEL United States OSHA: 5 mg/m3 TWA Belgium - TWA: 5 mg/m3 VLE France - VME: 5 mg/m3 VME Germany: 5 mg/m3 TWA (inhalable fraction) Malaysia: 5 mg/m3 TWA Netherlands: 5 mg/m3 MAC Spain: 5 mg/m3 VLA-ED CAS# 7732-18-5: Personal Protective Equipment 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 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Powder
Color: white
Odor: weak odor
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: 104-106 deg C
Autoignition Temperature: 380 deg C ( 716.00 deg F)
Flash Point: Not applicable.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: Not available.
Solubility in water: Insoluble in water.
Specific Gravity/Density: Not available.
Molecular Formula: (C6H5CO)2O2
Molecular Weight: 242.0676

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable under normal temperatures and pressures. Do not allow to dry.
In its dry form, benzoyl peroxide is highly flammable and explosive, sensitive to friction, shock and heat, and must be handled with extreme caution. A dangerous self-accelerating decomposition reaction and, under certain circumstances, explosion or fire can be caused by direct contact with incompatible substances or by thermal decomposition at and above the SADT (Self-Accelerating Decomposition Temp). SADT = 80C.
Conditions to Avoid:
Mechanical shock, ignition sources, excess heat, combustible materials, reducing agents, organic matter, temperatures above 38C/100F..
Incompatibilities with Other Materials:
Reducing agents, strong acids, bases, amines, metals, accelerators, methyl methacrylate, carbon tetrachloride and ethylene, organic matter, N,N - dimethylaniline and lithium aluminum hydride. Benzoyl peroxide is self-reactive chemical which can even explode without warning when the caps of old jars are unscrewed. It is extremely important to keep it pure, contaminants can lead to hazardous, unexpected explosions.
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide, benzene, benzoic acid, Phenyl benzoate, Terphenyls and Biphenyls.
Hazardous Polymerization: Has not been reported.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 94-36-0: DM8575000 CAS# 7732-18-5: ZC0110000 LD50/LC50:
CAS# 94-36-0: Draize test, rabbit, eye: 500 mg/24H Mild; Oral, mouse: LD50 = 1200 mg/kg; Oral, rat: LD50 = 7710 mg/kg; Oral, rat: LD50 = 6400 mg/kg.
CAS# 7732-18-5: Oral, rat: LD50 = >90 mL/kg.
Carcinogenicity:
Benzoyl peroxide - Not listed by ACGIH, IARC, or NTP.
Water - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
 

Section 13 - DISPOSAL CONSIDERATIONS
  Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: ORGANIC PEROXIDE TYPE C, SOLID *
Hazard Class: 5.2
UN Number: 3104
Packing Group: II
IMO
Shipping Name: ORGANIC PEROXIDE TYPE C, SOLID
Hazard Class: 5.2
UN Number: 3104
Packing Group: II
RID/ADR
Shipping Name: ORGANIC PEROXIDE TYPE C, SOLID
Hazard Class: 5.2
UN Number: 3104
Packing group:

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XI E
Risk Phrases:
R 2 Risk of explosion by shock, friction, fire or
other sources of ignition.
R 36 Irritating to eyes.
R 43 May cause sensitization by skin contact.
Safety Phrases:
S 3 Keep in a cool place.
S 7 Keep container tightly closed.
S 14 Keep away from ... (incompatible materials to
be indicated by the manufacturer).
S 14A Keep away from acids, reducing agents and
polymerisation catalysts.
S 36/37/39 Wear suitable protective clothing, gloves
and eye/face protection.
WGK (Water Danger/Protection)
CAS# 94-36-0: 1
CAS# 7732-18-5: No information available.
Canada
CAS# 94-36-0 is listed on Canada's DSL List.
CAS# 7732-18-5 is listed on Canada's DSL List.
CAS# 94-36-0 is listed on Canada's Ingredient Disclosure List.
CAS# 7732-18-5 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 94-36-0 is listed on the TSCA inventory.
CAS# 7732-18-5 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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