MATHESON TRI-GAS, INC. -- METHYL MERCAPTAN  -- -
<pre>=====================  Product Identification  =====================

Product ID:METHYL MERCAPTAN
MSDS Date:Jan 24 1989
Kit Part:=== Responsible Party ===
Company Name:MATHESON TRI-GAS, INC.
Address:959 ROUTE 46 EAST
City:PARSIPPANY
State:NJ
ZIP:07054-0624
Country:US
Info Phone Num:(USA) 973-257-1100, (WHITBY) 905-668-3570, (EDMONTON)
    780-471-4036
Chemtrec Ind/Phone:18004249300
=== Contractor Identification ===
Company Name:MATHESON TRI-GAS, INC.
Address:959 ROUTE 46 EAST
Box:City:PARSIPPANY
State:NJ
ZIP:07054-0624
Country:US
Phone:(USA) 973-257-1100, (WHITBY) 905-668-3570, (EDMONTON)
    780-471-4036
CAGE:Company Name:MATHESON TRI-GAS, INC.
Address:530 WATSON STREET
Box:City:WHITBY
State:ZIP:L1N 5R9
Country:ONTARIO, CANADA
Phone:(USA) 973-257-1100, (WHITBY) 905-668-3570, (EDMONTON)
    780-471-4036
CAGE:


=============  Composition/Information on Ingredients  =============

Ingred Name:METHYL MERCAPTAN
CAS:74-93-1
Fraction by Wt: 100.0%

=====================  Hazards Identification  =====================

Reports of Carcinogenicity:NTP:No    IARC:No	OSHA:No
Health Hazards Acute and Chronic:INHALATION: SHORT TERM EXPOSURE:
    irritation, nausea, vomiting, wheezing, irregular heartbeat,
    headache, symptoms of drunkenness, bluish skin color, suffocation,
    lung congestion, blood disorders, kidney damage, liver damage,
    convulsions, coma LONG TERM EXPOSURE: lung damage SKIN CONTACT:
    SHORT TERM EXPOSURE: irritation, blisters LONG TERM EXPOSURE: same
    as effects reported in short term exposure EYE CONTACT: SHORT TERM
    EXPOSURE: irritation, blurred vision LONG TERM EXPOSURE: same as
    effects reported in short term exposure INGESTION: SHORT TERM
    EXPOSURE: same as effects reported in other routes of exposure,
    frostbite LONG TERM EXPOSURE: no information is available
Medical Cond Aggravated by Exposure:

=======================  First Aid Measures  =======================

First Aid: INHALATION: If adverse effects occur, remove to
    uncontaminated area. Give artificial respiration if not breathing.
    If breathing is difficult, oxygen should be administered by
    qualified personnel. Get immediate medical attention. SKIN CONTACT:
    If frostbite or freezing occur, immediately flush with plenty of
    lukewarm water (105-115 F; 41-46 C). DO NOT USE HOT WATER. If warm
    water is not available, gently wrap affected parts in blankets. Get
    immediate medical attention. EYE CONTACT: Wash eyes immediately
    with large amounts of water, occasionally lifting upper and lower
    lids, until no evidence of chemical remains. Get medical attention
    immediately. INGESTION: If a large amount is swallowed, get medical
    attention. ANTIDOTE: amyl nitrite, inhalation; sodium nitrite,
    intravenous; pyridoxine, intravenous; urea, intravenous. CAUTION!
    Get medical attention immediately.

=====================  Fire Fighting Measures  =====================

Flash Point:<0 F (<-18 C) (OC)
Lower Limits:3.9%
Upper Limits:21.8%
Extinguishing Media:alcohol resistant foam Let burn unless leak can be
    stopped immediately. Large fires: Use regular foam or flood with
    fine water spray.
Fire Fighting Procedures:Move container from fire area if it can be
    done without risk. Withdraw immediately in case of rising sound
    from venting safety device or any discoloration of tanks due to
    fire. Cool containers with water spray until well after the fire is
    out. Keep unnecessary people away, isolate hazard area and deny
    entry. For tank, rail car or tank truck, evacuation radius:
    Evacuation radius: 800 meters (1/2 mile).
Unusual Fire/Explosion Hazard:Severe fire hazard. The vapor is heavier
    than air. Vapors or gases may ignite at distant ignition sources
    and flash back. Vapor/air mixtures are explosive. Electrostatic
    discharges may be generated by flow or agitation resulting in
    ignition or explosion.

==================  Accidental Release Measures  ==================

Neutralizing Agent:

======================	Handling and Storage  ======================

Handling and Storage Precautions:Store and handle in accordance with
    all current regulations and standards. Subject to storage
    regulations: U.S. OSHA 29 CFR 1910.101. Grounding and bonding
    required. Keep separated from incompatible substances. Notify State
    Emergency Response Commission for storage or use at amounts greater
    than or equal to the TPQ (U.S. EPA SARA Section 302). SARA Section
    303 requires facilities storing a material with a TPQ to
    participate in local emergency response planning (U.S. EPA 40 CFR
    355.30).
Other Precautions:

=============  Exposure Controls/Personal Protection  =============

Respiratory Protection:The following respirators and maximum use
    concentrations are drawn from NIOSH and/or OSHA. 5 ppm Any chemical
    cartridge respirator with organic vapor cartridge(s). Any
    supplied-air respirator. 12.5 ppm Any supplied-air respirator. Any
    powered, air-purifying respirator with organic vapor cartridge(s).
    25 ppm Any chemical cartridge respirator with a full facepiece and
    organic vapor cartridge(s). Any air-purifying respirator with a
    full facepiece and an organic vapor canister. Any powered,
    air-purifying respirator with a full facepiece and organic vapor
    cartridge(s). Any supplied-air respirator with a full facepiece.
    Any self-contained breathing apparatus with a full facepiece. Any
    supplied-air respirator with a full facepiece. 150 ppm Any
    supplied-air respirator operated in a pressure-demand or other
    positive-pressure mode. Escape - Any air-purifying respirator with
    a full facepiece and an organic vapor canister. Any appropriate
    escape-type, self-contained breathing apparatus. For Unknown
    Concentrations or Immediately Dangerous to Life or Health - Any
    supplied-air respirator with full facepiece and operated in a
    pressure-demand or other positive-pressure mode in combination with
    a separate escape supply. Any self-contained breathing apparatus
    with a full facepiece.
Ventilation:Provide local exhaust or process enclosure ventilation
    system. Ventilation equipment should be explosion-resistant if
    explosive concentrations of material are present. Ensure compliance
    with applicable exposure limits.
Protective Gloves:Wear insulated gloves.
Eye Protection:Wear splash resistant safety goggles with a faceshield.
    Provide an emergency eye wash fountain and quick drench shower in
    the immediate work area.
Other Protective Equipment:For the gas: Wear appropriate chemical
    resistant clothing. For the liquid: Wear appropriate protective,
    cold insulating clothing.
Supplemental Safety and Health
 METHYL MERCAPTAN: 10 ppm (20 mg/m3) OSHA ceiling 0.5 ppm (1 mg/m3)
    OSHA TWA (vacated by 58 FR 35338, June 30, 1993) 0.5 ppm ACGIH TWA
    0.5 ppm (1 mg/m3) NIOSH recommended ceiling 15 minute(s)

==================  Physical/Chemical Properties  ==================

Boiling Pt:43 F (6 C)
Melt/Freeze Pt:-189 F (-123 C)
Vapor Pres:1535 mmHg @ 21.1 C
Vapor Density:1.66
Spec Gravity:Not applicable
pH:Not applicable
Evaporation Rate &amp; Reference:Not applicable
Solubility in Water:2.4% @ 20 C
Appearance and Odor:PHYSICAL STATE:gas COLOR:colorless PHYSICAL
    FORM:liquid ODOR:garlic odor
Corrosion Rate:

=================  Stability and Reactivity Data  =================

Stability Indicator/Materials to Avoid:Contact with water or moist air
    may form flammable and/or toxic gases or vapors.
Stability Condition to Avoid:Avoid heat, flames, sparks and other
    sources of ignition. Minimize contact with material. Avoid
    inhalation of material or combustion by-products. Keep out of water
    supplies and sewers.
Hazardous Decomposition Products:Thermal decomposition products: oxides
    of sulfur Thermal decomposition products: oxides of sulfur
Conditions to Avoid Polymerization:Will not polymerize.

===================  Toxicological Information	===================

Toxicological Information:METHYL MERCAPTAN: TOXICITY DATA: 675 ppm
    inhalation-rat LC50 LOCAL EFFECTS: Irritant: inhalation, skin, eye
    ACUTE TOXICITY LEVEL: Toxic: inhalation TARGET ORGANS: blood,
    central nervous system MUTAGENIC DATA: Available.

=====================  Ecological Information  =====================

Ecological:ECOTOXICITY DATA: FISH TOXICITY: 500 ug/L 5 hour(s)
    (Mortality) Spotfin shiner (Notropis spilopterus) INVERTEBRATE
    TOXICITY: 50000 ug/L 48 hour(s) (Mortality) Midge (Chironomus sp)

====================  Disposal Considerations  ====================

Waste Disposal Methods:Dispose in accordance with all applicable
    regulations. Subject to disposal regulations: U.S. EPA 40 CFR 262.
    Hazardous Waste Number(s): U153.

===================  MSDS Transport Information  ===================

Transport Information:U.S. DOT 49 CFR 172.101: PROPER SHIPPING NAME:
    Methyl mercaptan ID NUMBER: UN1064 HAZARD CLASS OR DIVISION: 2.3
    LABELING REQUIREMENTS: Poison gas; Flammable gas QUANTITY
    LIMITATIONS: PASSENGER AIRCRAFT OR RAILCAR: Forbidden CARGO
    AIRCRAFT ONLY: 25 kg

=====================  Regulatory Information  =====================

SARA Title III Information:  SARA TITLE III SECTION 302 EXTREMELY
    HAZARDOUS SUBSTANCES (40 CFR 355.30):   METHYL MERCAPTAN: 500LBSTPQ
     SARA TITLE III SECTION 304 EXTREMELY HAZARDOUS SUBSTANCES (40 CFR
    355.40):   METHYL MERCAPTAN: 100LBSRQ  SARA TITLE III SARA SECTIONS
    311/312 HAZARDOUS CATEGORIES (40 CFR 370.21):   ACUTE: Yes 
    CHRONIC: No  FIRE: Yes  REACTIVE: No  SUDDEN RELEASE: Yes  SARA
    TITLE III SECTION 313 (40 CFR 372.65):   METHYL MERCAPTAN
Federal Regulatory Information:CERCLA SECTIONS 102a/103 HAZARDOUS
    SUBSTANCES (40 CFR 302.4):	METHYL MERCAPTAN: 100LBSRQ OSHA PROCESS
    SAFETY (29CFR1910.119):  METHYL MERCAPTAN: 5000LBSTQ
State Regulatory Information: California Proposition 65: Not regulated.

=======================  Other Information  =======================

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 This information is formulated for use by elements of the Department
 of Defense.  The United States of America in no manner whatsoever,
 expressly or implied, warrants this information to be accurate and
 disclaims all liability for its use.  Any person utilizing this
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 assume responsibility for the suitability of this information to their
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