2,3-Dimethylpyrazine

  • Pyrazine, 2,3-dimethyl-
Formula
C6H8N2
Structure
Description
Clear, yellow liquid. with a nutty odor.

Registry Numbers and Inventories.
CAS
5910-89-4
EC (EINECS/ELINCS)
227-630-0
EC Class
flammable, harmful
R 10 22
S 23 36/37
RTECS
UQ2625000
RTECS class
Other
UN (DOT)
1993
Beilstein/Gmelin
107908
Beilstein Reference
5-23-05-00492
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C6H8N2
Formula mass
108.14
Melting point, °C
-12
Boiling point, °C
156
Vapor pressure, mmHg
30 (20 C)
Density
1.022 g/cm3 (25 C)
Solubility in water
Miscible.
Refractive index
1.51 (20 C)
pKa/pKb
12.03 (pKb)

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container.
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
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
Make no contact with the spilled material. ELIMINATE all ignition sources and ground all equipment. Stop leak if you can do it without risk. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collect absorbed material.
Disposal code
5
Stability
No data.
Incompatibilities
Keep away from strong oxidizing agents, strong acids.

Fire.
Flash Point,°C
54
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 spray, dry chemical, carbon dioxide, orchemical foam.
Fire potential
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure effects
   Ingestion
Harmful if swallowed.
   Inhalation
May cause irritation.
   Skin
May cause irritation.
   Eyes
May cause irritation.

First aid
 
   Ingestion
Get medical aid immediately. Wash mouth out with water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower lids. Get medical aid.

Transport.
UN number
1993
Response guide
Hazard class
3
Packing Group
I; II; III
 
HS Code
2933 99 90