MSDS Name:Azobenzene 95%
Synonym:1,2-Diphenyldiazene; diphenyldiimide; azobenzide; azobenzol; azobisbenzene; benzeneazobenzene

EMERGENCY OVERVIEW
Harmful by inhalation and if swallowed. May cause cancer. Harmful : danger of serious damage to health by prolonged exposure if swallowed. Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.Cancer suspect agent.
Potential Health Effects
Eye:
May cause eye irritation. Causes eye irritation.
Skin:
May cause skin irritation. Causes skin irritation.
Ingestion:
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed.
Inhalation:
Causes respiratory tract irritation. May cause effects similar to those described for ingestion.
Chronic:
May cause bone marrow abnormalities with damage to blood forming tissues. May cause cancer according to animal studies.

Eyes: 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. Wash clothing before reuse.
Ingestion:
If victim is conscious and alert, give 2-4 cupfuls of milk or water.
Never give anything by mouth to an unconscious person. Get medical aid immediately.
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:
Antidote: None reported.

General Information:
As in any fire, 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.
Extinguishing Media:
Use water spray, dry chemical, carbon dioxide, or appropriate foam.

General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Reduce airborne dust and prevent scattering by moistening with water. Clean up spills immediately, observing precautions in the Protective Equipment section. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal.
Avoid generating dusty conditions. Provide ventilation.

Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.
Storage:
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.

Engineering Controls:
Use adequate ventilation to keep airborne concentrations low.
Exposure Limits CAS# 103-33-3: Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHAs 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.

Physical State: Crystals
Color: orange to red
Odor: None reported.
pH: Not available.
Vapor Pressure: 0.00036 mm Hg @ 25 deg C
Viscosity: Not available.
Boiling Point: 293 deg C
Freezing/Melting Point: 68 deg C
Autoignition Temperature: Not applicable.
Flash Point: 476 deg C ( 888.80 deg F)
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: Not available.
Solubility in water: Insoluble.
Specific Gravity/Density: 1.20 @ 20C
Molecular Formula: C12H10N2
Molecular Weight: 182.22

Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Dust generation.
Incompatibilities with Other Materials:
Strong oxidizing agents.
Hazardous Decomposition Products:
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.
Hazardous Polymerization: Has not been reported.

RTECS#:
CAS# 103-33-3: CN1400000 LD50/LC50:
CAS# 103-33-3: Oral, rat: LD50 = 1 gm/kg.
Some references say probable oral lethal dose (human) = 50-500 mg/kg.
Carcinogenicity:
Azobenzene - California: carcinogen, initial date 1/1/90 Other:
See actual entry in RTECS for complete information.

Ecotoxicity:
Bacteria: Phytobacterium phosphoreum: EC50 = 0.93-1.29 mg/L; 5,15,30 Minutes; Microtox test

Dispose of in a manner consistent with federal, state, and local regulations.

IATA
Shipping Name: Not regulated.
Hazard Class:
UN Number:
Packing Group:
IMO
Shipping Name: Not regulated.
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RID/ADR
Shipping Name: Not regulated.
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European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T N
Risk Phrases:
R 45 May cause cancer.
R 20/22 Harmful by inhalation and if swallowed.
R 48/22 Harmful : danger of serious damage to health
by prolonged exposure if swallowed.
R 50/53 Very toxic to aquatic organisms, may cause
long-term adverse effects in the aquatic environment.
Safety Phrases:
S 53 Avoid exposure - obtain special instructions
before use.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
S 60 This material and its container must be
disposed of as hazardous waste.
S 61 Avoid release to the environment. Refer to
special instructions/safety data sheets.
WGK (Water Danger/Protection)
CAS# 103-33-3: 2
Canada
CAS# 103-33-3 is listed on Canadas DSL List.
CAS# 103-33-3 is listed on Canadas Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 103-33-3 is listed on the TSCA inventory.