MSDS Name:Dimethyldiselenide 99+%
Synonym:

EMERGENCY OVERVIEW
Toxic by inhalation and if swallowed. Danger of cumulative effects.The toxicological properties of this material have not been fully investigated.
Potential Health Effects
Eye:
May cause eye irritation.
Skin:
May cause skin irritation.
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.
Chronic:
Not available.

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

General Information:
As in any fire, 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.
Extinguishing Media:
Use water spray, dry chemical, carbon dioxide, or chemical foam.

General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Remove all sources of ignition.
Use a spark-proof tool.

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.
Storage:
Keep away from sources of ignition. Store in a tightly closed container. Store in a dry area. Keep refrigerated. (Store below 4C/39F.)

Engineering Controls:
Use adequate ventilation to keep airborne concentrations low.
Exposure Limits CAS# 7101-31-7: United Kingdom, WEL - TWA: (listed as selenium compounds): 0.1 mg TWA (except hydrogen selenide, as Se) United Kingdom, WEL - STEL: (listed as selenium compounds): 0.3 m STEL (except hydrogen selenide, as Se) United States OSHA: 0.2 mg/m3 TWA (as Se) (listed under Selenium compounds).
Belgium - TWA: (listed as selenium compounds): 0.2 mg/m3 VLE (as Japan: (listed as selenium compounds): 0.1 mg/m3 OEL (except SeH2 SeF6, as Se) Malaysia: (listed as selenium compounds): 0.2 mg/m3 TWA (as Se) Netherlands: (listed as selenium compounds): 0.1 mg/m3 MAC (as Se Spain: (listed as selenium compounds): 0.1 mg/m3 VLA-ED (except hydrogen selenide, as Se) Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHAs 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 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Physical State: Liquid
Color: clear red-brown
Odor: Stench
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: 155 - 157 deg C @ 760.00mm Hg
Freezing/Melting Point: 0 deg C
Autoignition Temperature: Not available.
Flash Point: 60 deg C ( 140.00 deg F)
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water:
Specific Gravity/Density: 1.9870g/cm3
Molecular Formula: C2H6Se2
Molecular Weight: 187.99

Chemical Stability:
Not available.
Conditions to Avoid:
Incompatible materials, ignition sources, excess heat.
Incompatibilities with Other Materials:
Strong oxidizing agents - strong acids.
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide, selenium/selenium oxides.
Hazardous Polymerization: Has not been reported.

RTECS#:
CAS# 7101-31-7 unlisted.
LD50/LC50:
Not available.
Carcinogenicity:
DIMETHYLDISELENIDE - Not listed by ACGIH, IARC, or NTP.

Dispose of in a manner consistent with federal, state, and local regulations.

IATA
Shipping Name: TOXIC LIQUID, FLAMMABLE, ORGANIC, N.O.S.*
Hazard Class: 6.1 (3)
UN Number: 2929
Packing Group: II
IMO
Shipping Name: TOXIC LIQUID, FLAMMABLE, ORGANIC, N.O.S.
Hazard Class: 6.1 (3)
UN Number: 2929
Packing Group: II
RID/ADR
Shipping Name: TOXIC LIQUID, FLAMMABLE, ORGANIC, N.O.S.
Hazard Class: 6.1
UN Number: 2929
Packing group: II

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T
Risk Phrases:
R 23/25 Toxic by inhalation and if swallowed.
R 33 Danger of cumulative effects.
Safety Phrases:
S 20/21 When using do not eat, drink or smoke.
S 28A After contact with skin, wash immediately with
plenty of water.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
WGK (Water Danger/Protection)
CAS# 7101-31-7: No information available.
Canada
None of the chemicals in this product are listed on the DSL/NDSL list.
CAS# 7101-31-7 is not listed on Canadas Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 7101-31-7 is not listed on the TSCA inventory.
It is for research and development use only.