dimethyl disulfide 624-92-0 MSDS
Name: Methyl disulfide p.a. Material Safety Data Sheet
Synonym: Dimethyl disulfide; Dimethyldisulfide; Disulfide, dimethy
CAS: 624-92-0
Section 1 - Chemical Product   MSDS Name:Methyl disulfide p.a. Material Safety Data Sheet
Synonym:Dimethyl disulfide; Dimethyldisulfide; Disulfide, dimethy

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
624-92-0 Methyl disulfide 100 210-871-0
Hazard Symbols: T+ F
Risk Phrases: 11 26

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Highly flammable. Very toxic by inhalation.Highly toxic.Stench.
Potential Health Effects
Eye:
Causes eye irritation.
Skin:
Causes skin irritation. May cause dermatitis.
Ingestion:
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause liver damage. May be harmful if swallowed.
Inhalation:
May be fatal if inhaled. Vapors may cause dizziness or suffocation.
Causes upper respiratory tract irritation. Exposure may cause blood abnormalities. Causes irritation of the mucous membrane.
Chronic:
Effects may be delayed. Exposure to high concentrations may cause tearing, cyanosis (bluish discoloration of skin due to deficient oxygenation of the blood), central nervous system depression or hemorrhage in the lung. Prolonged or repeated exposure may cause hemolytic anemia which can lead to renal failure.

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.
Skin:
Get medical aid. Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Wash clothing before reuse.
Ingestion:
Do not induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh air immediately. If breathing is difficult, give oxygen. Do NOT use mouth-to-mouth resuscitation. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
Notes to Physician:
Treat symptomatically and supportively.

Section 5 - FIRE FIGHTING MEASURES
  General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Water runoff can cause environmental damage. Dike and collect water used to fight fire. Vapors may form an explosive mixture with air. Vapors can travel to a source of ignition and flash back. Can burn in a fire, releasing toxic vapors. Will burn if involved in a fire. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Flammable liquid and vapor. Vapors may be heavier than air. They can spread along the ground and collect in low or confined areas. May be ignited by heat, sparks, and flame. Containers may explode when heated.
Extinguishing Media:
Water may be ineffective. Do NOT use straight streams of water. For large fires, use water spray, fog or regular foam. For small fires, use dry chemical, carbon dioxide, 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:
Use water spray to dilute spill to a non-flammable mixture. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, observing precautions in the Protective Equipment section. Remove all sources of ignition. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. Do not use combustible materials such as sawdust. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors. Water spray may reduce vapor but may not prevent ignition in closed spaces.

Section 7 - HANDLING and STORAGE
  Handling:
Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep away from heat, sparks and flame. Do not ingest or inhale. Use only in a chemical fume hood. 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. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area. Keep containers tightly closed.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Use explosion-proof ventilation equipment. Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use only under a chemical fume hood.
Exposure Limits CAS# 624-92-0: 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: Liquid
Color: clear, colorless
Odor: stench
pH: Not available.
Vapor Pressure: 28.6 mm Hg @ 25 C
Viscosity: 0.620 cP 20 deg C
Boiling Point: 109 deg C @ 760.00mm Hg
Freezing/Melting Point: -85 deg C
Autoignition Temperature: Not applicable.
Flash Point: 15 deg C ( 59.00 deg F)
Explosion Limits, lower: 1.10 vol %
Explosion Limits, upper: 16.00 vol %
Decomposition Temperature:
Solubility in water: insoluble
Specific Gravity/Density: 1.0625g/cm3
Molecular Formula: C2H6S2
Molecular Weight: 94.19

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable under normal temperatures and pressures. Reacts vigorously with oxidizing agents. Photochemically oxidized by ozone.
Conditions to Avoid:
Incompatible materials, ignition sources, excess heat, strong oxidants.
Incompatibilities with Other Materials:
May react with copper, rubber, and plastic, strong oxidizing agents.
Hazardous Decomposition Products:
Carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide, hydrogen sulfide.
Hazardous Polymerization: Has not been reported.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 624-92-0: JO1927500 LD50/LC50:
CAS# 624-92-0: Draize test, rabbit, eye: 100 uL/24H; Inhalation, mouse: LC50 = 12300 ug/m3/2H; Inhalation, rat: LC50 = 15850 ug/m3/2H.
Oral, rat: LD50 = 535 Carcinogenicity:
Methyl disulfide - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
  Ecotoxicity:
Estimated Koc values of 36-218 suggest moderate to high soil mobility of solution-phase methyl disulfide. Volatilization and photodegradation are expected to be major fate processes for methyl disulfide in water. Aquatic hydrolysis, bioconcentration and adsorption to sediment are not expected to be important fate processes because of the lack of hydroyzable group and high water solubility. Based upon a vapor pressure of 28.7 mm Hg at 25 deg C methyl disulfide is expected to exist primary in the vapor phase in the ambient atmosphere.

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

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: DIMETHYL DISULPHIDE
Hazard Class: 3
UN Number: 2381
Packing Group: II
IMO
Shipping Name: DIMETHYL DISULPHIDE
Hazard Class: 3.2
UN Number: 2381
Packing Group: II
RID/ADR
Shipping Name: DIMETHYL DISULPHIDE
Hazard Class: 3
UN Number: 2381
Packing group: II

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T+ F
Risk Phrases:
R 11 Highly flammable.
R 26 Very toxic by inhalation.
Safety Phrases:
S 9 Keep container in a well-ventilated place.
S 16 Keep away from sources of ignition - No
smoking.
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 33 Take precautionary measures against static
discharges.
WGK (Water Danger/Protection)
CAS# 624-92-0: 2
Canada
CAS# 624-92-0 is listed on Canada's DSL List.
CAS# 624-92-0 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 624-92-0 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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