Benzoselenazole, 2-methyl

  • 2-Methylbenzoselenazole
Formula
C8H7NSe
Structure
Description
Yellow solid.

Registry Numbers and Inventories.
CAS
2818-88-4
EC (EINECS/ELINCS)
220-577-4
RTECS
DK7700000
RTECS class
Primary Irritant
UN (DOT)
2810
Beilstein/Gmelin
112836
Beilstein Reference
4-27-00-01092
Canada DSL/NDSL
NDSL
US TSCA
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C8H7NSe
Formula mass
196.11
Melting point, °C
34
Boiling point, °C
232
Vapor pressure, mmHg
0.09 (25 C)
Solubility in water
Insoluble
Refractive index
1.6532 (20 C)
pKa/pKb
8.73 (pKb)
Partition coefficient, pKow
2.06
Heat of vaporization
45.0 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container.
Handling
Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.
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
Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions.
Stability
No data.
Incompatibilities
Strong oxidizing agents.
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide, selenium/selenium oxides.

Fire.
Flash Point,°C
94
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
Combustible material: may burn but does not ignite readily.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure effects
   Ingestion
Poison by ingestion.
   Inhalation
The toxicological properties of this substance have not been fully investigated. Toxic if inhaled.
   Skin
Causes mild skin irritation.
   Eyes
Causes mild eye irritation.

First aid
 
   Ingestion
Get medical aid immediately. Wash mouth out with water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   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
2810
Response guide
Hazard class
6.1
Packing Group
I; II; III