Quinoxaline

  • 1,4-Benzodiazine
  • Phenopiazine
  • Benzoparadiazine
  • 1,4-Diazanaphthalene
  • 1,4-Naphthyridine
  • Quinazine
Formula
C8H6N2
Structure
Description
Yellow to brown solid. Quinoline-like odor.

Registry Numbers and Inventories.
CAS
91-19-0
EC (EINECS/ELINCS)
202-047-4
R 36/38
RTECS
VD1225000
RTECS class
Agricultural Chemical and Pesticide; Mutagen
Merck
12,8263
Beilstein/Gmelin
109351
Beilstein Reference
5-23-07-00135
Canada DSL/NDSL
DSL
US TSCA
Listed
New Zealand
Listed

Properties.
Formula
C8H6N2
Formula mass
130.15
Melting point, °C
30 - 32
Boiling point, °C
230
Vapor pressure, mmHg
0.1 (25 C)
Density
1.1485 g/cm3 (32 C)
Solubility in water
Slightly osluble
Refractive index
1.6231 (20 C)
pKa/pKb
13.41 (pKb)
Partition coefficient, pKow
1.35
Heat of vaporization
44.7 kJ/mol
Heat of combustion
-4179 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container.
Handling
Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.
Protection
Eyes: Wear chemical goggles. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear a chemical apron.
Respirators
A NIOSH/MSHA approved air purifying dust or mist respirator or European Standard EN 149.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment.
Disposal code
3
Stability
No data.
Incompatibilities
Strong oxidizing agents.
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
98
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Health.
Exposure effects
   Ingestion
No information found.
   Inhalation
No information available.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Get medical aid. 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. Get medical aid if cough or other symptoms appear.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
HS Code
2933 99 90