1H-Benzotriazole
1,2,3-Triazaindene
1,2,3-Benzotriazole
Azimidobenzene
C6H5N3
Molecular mass: 119.1
ICSC # 1091
CAS # 95-14-7
RTECS # DM1225000
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
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NO open flames.
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Water spray.
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Explosion
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Finely dispersed particles form explosive mixtures in air.
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Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.
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Exposure
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PREVENT DISPERSION OF DUST!
STRICT HYGIENE!
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•Inhalation
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Local exhaust.
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Fresh air, rest.
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•Skin
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
Pain.
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Safety spectacles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Give one or two glasses of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Carefully collect remainder,
then remove to safe place.
Do NOT let this chemical enter the environment.
(Extra personal protection: P1 filter respirator for inert particles).
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Well closed.
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Important Data
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Physical State; Appearance:
WHITE TO BROWN CRYSTALLINE POWDER
Physical Dangers:
Dust explosion possible if in powder or granular form, mixed with air.
Chemical Dangers:
The substance decomposes
on heating
producing toxic fumes including aniline and nitrobenzene.
The solution in water is a weak acid.
May explode on vacuum distillation.
Occupational Exposure Limits:
TLV not established.
MAK: IIb (not established but data is available) (DFG 2008).
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its aerosol and
by ingestion.
Inhalation Risk:
Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly.
Effects of Short-Term Exposure:
The substance
irritates
the eyes.
Effects of Long-Term or Repeated Exposure:
Repeated or prolonged contact may cause skin sensitization.
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Physical
Properties
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Boiling point at 2 kPa: 204°C
Sublimation point: 200°C
Decomposes below boiling point at 260°C
Melting point: 98.5°C
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Density: 1.36 g/cm3
Solubility in water, g/100 ml: 2 (moderate)
Vapour pressure, Pa at 20°C: 5
Flash point: 190-195°C o.c.
Auto-ignition temperature: 210°C
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Environmental
Data
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The substance is harmful to aquatic organisms.
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N O T E S
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Health effects of exposure to the substance have not been investigated adequately.
Cobratec #99, U-6233 are trade names.
Card has been partially updated in November 2008: see Occupational Exposure Limits,
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ADDITIONAL INFORMATION
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ICSC: 1091
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BENZOTRIAZOLE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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