Product Identification

Product Name

Dimethyldiselenide

Synonyms

Dimethyl diselenide
Methyldiselanylmethane

CAS

7101-31-7

Formula

C2H6Se2

Molecular Weight

187.98

EINECS

230-410-7

Beilstein/Gmelin

1696897

Beilstein Reference

4-01-00-01288

Physical and Chemical Properties

Appearance

Clear red-brown liquid. With a stench.

Melting Point

-82

Boiling Point

155

Vapor Pressure

1 (15 C)

Density

2.0009 g/cm3 (20 C)

Heat Of Vaporization

74.9 kJ/mol

Refractive Index

1.6361 (20 C)

First Aid Measures

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.

Handling and Storage

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.

Hazards Identification

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.

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.

UN (DOT)

2929

Exposure Controls/Personal Protection

Personal 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.

Fire Fighting Measures

Flash Point

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.

Accidental Release Measures

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 and Reactivity

Stability

No data.

Incompatibilities

Strong oxidizing agents - strong acids.

Decomposition

Carbon monoxide, carbon dioxide, selenium/selenium oxides.

Combustion Products

Fire will produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

2929

Hazard Class

6.1

Packing Group

I; II