5-Methylbenzotriazole

  • 5-Methyl-1H-benzotriazole (1,2,3)
Formula
C7H7N3
Structure
Description
Beige powder

Registry Numbers and Inventories.
CAS
136-85-6
EC (EINECS/ELINCS)
205-265-8
R 22 36/37/38
S 26 36/37/39
RTECS
DM1400000
RTECS class
Other
Beilstein/Gmelin
116658
Beilstein Reference
4-26-00-00144
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C7H7N3
Formula mass
133.17
Melting point, °C
85
Boiling point, °C
361
Vapor pressure, mmHg
2E-5 (25 C)
Solubility in water
6 g/L
pKa/pKb
8.66 (pKa)
Partition coefficient, pKow
1.80
Heat of vaporization
60.6 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use.
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 safety goggles, protective clothing and gloves.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Avoid contact with strong oxidizing agents, strong acids.

Fire.
Flash Point,°C
182
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. In case of fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
Hazards
During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.

Health.
Exposure effects
The toxicological properties of this material have not been investigated.

First aid
 
   Ingestion
Do NOT induce vomiting. Allow the victim to rinse his mouth and then to drink 2-4 cupfuls of water, and seek medical advice.
   Inhalation
Remove from exposure to fresh air immediately.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower lids.

Transport.