Dimethyl diselenide

  • Diselenide, dimethyl
Formula
C2H6Se2
Structure
Description
Clear red-brown liquid. With a stench.

Registry Numbers and Inventories.
CAS
7101-31-7
EC (EINECS/ELINCS)
230-410-7
UN (DOT)
2929
Beilstein/Gmelin
1696897
Beilstein Reference
4-01-00-01288

Properties.
Formula
C2H6Se2
Formula mass
187.98
Melting point, °C
-82
Boiling point, °C
155
Vapor pressure, mmHg
1 (15 C)
Density
2.0009 g/cm3 (20 C)
Refractive index
1.6361 (20 C)
Heat of fusion
8.55 kJ/mol
Heat of vaporization
74.9 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a tightly closed container. Store in a dry area. Refrigerator (approx 4 C).
Handling
Use spark-proof tools and explosion proof equipment. 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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Remove all sources of ignition. Use a spark-proof tool.
Stability
No data.
Incompatibilities
Strong oxidizing agents - strong acids.
Decomposition
Carbon monoxide, carbon dioxide, selenium/selenium oxides.

Fire.
Flash Point,°C
60
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. Combustible Liquid. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical 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 and poison hazard indoors, outdoors or in sewers.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.

Health.
Exposure effects
   Ingestion
Poison by ingestion. The toxicological properties of this substance have not been fully investigated. May cause headache. May cause nausea and vomiting.
   Inhalation
The toxicological properties of this substance have not been fully investigated. Toxic if inhaled.
   Skin
May cause skin irritation.
   Eyes
May cause 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
2929
Response guide
Hazard class
6.1
Packing Group
I; II