4(or 5)-Methyl-1H-imidazole

  • 4(5)-Methylimidazole
  • 4(5)-Methylimidazole
Formula
C4H6N2
Structure
Description
Slightly yellow solid.

Registry Numbers and Inventories.
CAS
822-36-6
EC (EINECS/ELINCS)
212-497-3
R 22 34
S 26 36/37/39 45
RTECS
NI7350000
RTECS class
Tumorigen
UN (DOT)
3263
Beilstein/Gmelin
1453
Beilstein Reference
5-23-05-00089
Swiss Giftliste 1
G-9032
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H6N2
Formula mass
82.10
Boiling point, °C
263
Vapor pressure, mmHg
0.02 (25 C)
Density
1.0416 g/cm3 (14.3 C)
Solubility in water
Very soluble
Surface tension
38.7 g/s2 (20 C)
Refractive index
1.5037 (14 C)
pKa/pKb
6.51 (pKb)
Partition coefficient, pKow
0.38
Heat of vaporization
48.1 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale.
Protection
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 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions.
Stability
No data.
Incompatibilities
Acids, acid chlorides, acid anhydrides, strong oxidizing agents.
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
157
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Poison_Class
3
Exposure effects
   Ingestion
May cause severe gastrointestinal tract irritation with nausea, vomiting and possible burns.
   Inhalation
Effects may be delayed. May cause severe respiratory tract irritation. May cause burns to the respiratory tract.
   Skin
Causes skin burns. Effects may be delayed.
   Eyes
Causes eye burns.

First aid
 
   Ingestion
Do NOT induce vomiting. 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 to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid immediately. Immediately 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 eyelids. Get medical aid immediately.

Transport.
UN number
3263
Response guide
Hazard class
8
Packing Group
I; II; III