tetraoxoosmium
CAS No.: 20816-12-0
Synonyms:
Formula: O4Os
Exact Mass: 255.94100
Molecular Weight: 254.22800
PSA: 68.28000
LogP: -0.47520
tetraoxoosmium 20816-12-0 MSDS
Name: Osmium tetroxide 2.5 wt% sol. in tert- butanol stab. with Material Safety Data Sheet
Synonym: Osmic acid; Osmium tetroxide; Perosmic oxide
CAS: 20816-12-0
Section 1 - Chemical Product   MSDS Name:Osmium tetroxide 2.5 wt% sol. in tert- butanol stab. with Material Safety Data Sheet
Synonym:Osmic acid; Osmium tetroxide; Perosmic oxide

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
20816-12-0 OSMIUM TETROXIDE 100 244-058-7
Hazard Symbols: T+
Risk Phrases: 26/27/28 34

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Very toxic by inhalation, in contact with skin and if swallowed.
Causes burns.Corrosive.Stench.
Potential Health Effects
Eye:
Causes severe eye irritation. Causes eye burns. May cause blindness. May cause lacrimation (tearing), blurred vision, and photophobia. May cause chemical conjunctivitis and corneal damage.
Skin:
May cause skin irritation and possible burns. Causes skin irritation and possible burns.
Ingestion:
May be fatal if swallowed. Aspiration hazard. Causes cough, sore throat, chest pain, and lightheadedness. May cause nausea, vomiting, abdominal pain, and increased salivation.
Inhalation:
May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. May cause bronchopneumonia and possible death. Olfactory fatigue may occur. Can produce delayed pulmonary edema.
Chronic:
Prolonged or repeated skin contact may cause dermatitis. Prolonged or repeated exposure may cause adverse reproductive effects.

Section 4 - FIRST AID MEASURES
  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:
Do not induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.
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:

Section 5 - FIRE FIGHTING MEASURES
  General Information:
Evacuate area and fight fire from a safe distance. As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
Oxidizer. Greatly increases the burning rate of combustible materials. Dust can be an explosion hazard when exposed to heat or flame. Flammable solid. May burn rapidly with flare burning effect.
May re-ignite after fire is extinguished.
Extinguishing Media:
For large fires, use water spray, fog or regular foam. Contact professional fire-fighters immediately. For small fires, use dry chemical, carbon dioxide, sand, earth, water spray or regular foam.
Cool containers with flooding quantities of water until well after fire is out.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Reduce airborne dust and prevent scattering by moistening with water. Wear a self contained breathing apparatus and appropriate personal protection. (See Exposure Controls, Personal Protection section). Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Remove all sources of ignition.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Keep away from heat, sparks and flame. Do not get on skin or in eyes. Do not ingest or inhale. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Storage:
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Do not store near combustible materials. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Poison room locked.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate general or local explosion-proof ventilation to keep airborne levels to acceptable levels.
Exposure Limits CAS# 20816-12-0: United Kingdom, WEL - TWA: 0.0002 ppm TWA (as Os); 0.002 mg/m3 TW (as Os) United Kingdom, WEL - STEL: 0.0006 ppm STEL (as Os); 0.006 mg/m3 (as Os) United States OSHA: 0.002 mg/m3 TWA (As Os) Belgium - TWA: 0.0002 ppm VLE (as Os); 0.0016 mg/m3 VLE (as Os) Belgium - STEL: 0.0006 ppm VLE (as Os); 0.0048 mg/m3 VLE (as Os) France - VME: 0.0002 ppm VME (as Os); 0.002 mg/m3 VME (as Os) Germany: 0.0002 ppm TWA; 0.0021 mg/m3 TWA Germany: Skin absorber Malaysia: 0.0002 ppm TWA (as Os); 0.0016 mg/m3 TWA (as Os) Netherlands: 0.0002 ppm MAC; 0.002 mg/m3 MAC (as Os) Spain: 0.0002 ppm VLA-ED (as Os); 0.002 mg/m3 VLA-ED (as Os) Spain: 0.0006 ppm VLA-EC (as Os); 0.006 mg/m3 VLA-EC (as Os) Personal Protective Equipment 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:
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant respirator use.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Solid
Color: almost white
Odor: chlorine-like
pH: Not available.
Vapor Pressure: 7 mm Hg @ 20C
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: Not available.
Autoignition Temperature: Not applicable.
Flash Point: 4 deg C ( 39.20 deg F)
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water:
Specific Gravity/Density:
Molecular Formula: O4Os
Molecular Weight: 254.20

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Incompatible materials, ignition sources, dust generation, excess heat.
Incompatibilities with Other Materials:
Strong oxidizing agents, hydrochloric acid, bases, finely powdered metals, organic materials, strong reducing agents.
Hazardous Decomposition Products:
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.
Hazardous Polymerization: Has not been reported.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 20816-12-0: RN1140000 LD50/LC50:
CAS# 20816-12-0: Oral, mouse: LD50 = 162 mg/kg.
Carcinogenicity:
OSMIUM TETROXIDE - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
  Other No information available.

Section 13 - DISPOSAL CONSIDERATIONS
  Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: FLAMMABLE LIQUID, TOXIC, N.O.S.*
Hazard Class: 3 (6.1)
UN Number: 1992
Packing Group: II
IMO
Shipping Name: FLAMMABLE LIQUID, TOXIC, N.O.S.
Hazard Class: 3.2 (6.1)
UN Number: 1992
Packing Group: II
RID/ADR
Shipping Name: FLAMMABLE LIQUID, TOXIC, N.O.S.
Hazard Class: 3
UN Number: 1992
Packing group: II
USA RQ: CAS# 20816-12-0: 1000 lb final RQ; 454 kg final RQ

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T+
Risk Phrases:
R 26/27/28 Very toxic by inhalation, in contact with
skin and if swallowed.
R 34 Causes burns.
Safety Phrases:
S 7/9 Keep container tightly closed and in a
well-ventilated place.
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
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# 20816-12-0: 2
Canada
CAS# 20816-12-0 is listed on Canada's DSL List.
CAS# 20816-12-0 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 20816-12-0 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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