MATHESON TRI-GAS, INC. -- HYDROGEN SELENIDE -- - 
=====================  Product Identification  =====================

Product ID:HYDROGEN SELENIDE
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)
    780-471-4031
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)
    780-471-4031
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)
    780-471-4031
CAGE:


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

Ingred Name:HYDROGEN SELENIDE
CAS:7783-07-5
Fraction by Wt: 100.0%

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

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 or normal saline, 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. NOTE TO PHYSICIAN: For
    inhalation, consider oxygen.  Consider olive oil, epinephrine
    sulfate, local anesthetics, hot and cold compresses.

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

Flash Point:flammable
Extinguishing Media: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. Cool containers with water spray until well
    after the fire is out. Stay away from the ends of tanks. For fires
    in cargo or storage area: Cool containers with water from unmanned
    hose holder or monitor nozzles until well after fire is out. If
    this is impossible then take the following precautions: Keep
    unnecessary people away, isolate hazard area and deny entry. Let
    the fire burn. Withdraw immediately in case of rising sound from
    venting safety device or any discoloration of tanks due to fire.
    For tank, rail car or tank truck: 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 above flash point.
    Containers may rupture or explode if exposed to heat.

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

Spill Release Procedures:Avoid heat, flames, sparks and other sources
    of ignition. Stop leak if possible without personal risk. Reduce
    vapors with water spray. Keep unnecessary people away, isolate
    hazard area and deny entry. Remove sources of ignition. Notify
    Local Emergency Planning Committee and State Emergency Response
    Commission for release greater than or equal to RQ (U.S. SARA
    Section 304). If release occurs in the U.S. and is reportable under
    CERCLA Section 103, notify the National Response Center at
    (800)424-8802 (USA) or (202)426-2675 (USA).
Neutralizing Agent:

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

Other Precautions:

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

Respiratory Protection:The following respirators and maximum use
    concentrations are drawn from NIOSH and/or OSHA. 0.5 ppm Any
    supplied-air respirator. 1 ppm Any supplied-air respirator. Any
    self-contained breathing apparatus with a full facepiece. Any
    supplied-air respirator with a full facepiece. Escape - Any
    air-purifying respirator with a full facepiece and a canister
    providing protection against this substance. Only non-oxidizable
    sorbents are allowed (not charcoal). 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
 HYDROGEN SELENIDE: HYDROGEN SELENIDE (as Se): 0.05 ppm (0.2 mg/m3)
    OSHA TWA 0.05 ppm ACGIH TWA 0.05 ppm (0.2 mg/m3) NIOSH recommended
    TWA 10 hour(s)

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

Boiling Pt:-44 F (-42 C)
Melt/Freeze Pt:-83 F (-64 C)
Vapor Pres:7220 mmHg @ 21.1 C
Vapor Density:2.8
Spec Gravity:2.12 @ -42 C
pH:acidic
Evaporation Rate & Reference:Not applicable
Solubility in Water:377% @ 4 C
Appearance and Odor:PHYSICAL STATE:gas COLOR:colorless ODOR:unpleasant
    odor
Corrosion Rate:

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

Stability Indicator/Materials to Avoid:May ignite on exposure to air.
    May explode on contact with water.
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 selenium Thermal decomposition products: oxides of selenium
Conditions to Avoid Polymerization:Will not polymerize.

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

Toxicological Information:HYDROGEN SELENIDE: TOXICITY DATA: 300 ppb/8
    hour(s) inhalation-guinea pig LC50 LOCAL EFFECTS: Irritant:
    inhalation, skin, eye ACUTE TOXICITY LEVEL: Highly Toxic:
    inhalation MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE: liver
    disorders, respiratory disorders

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

Ecological:Not available

====================  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): D003.

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

Transport Information:U.S. DOT 49 CFR 172.101. SHIPPING NAME-UN NUMBER;
    HAZARD CLASS; PACKING GROUP; LABEL: Hydrogen selenide,
    anhydrous-UN2202; 2.3; Poison gas; Flammable gas

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

SARA Title III Information:  SARA SECTION 302 (40CFR355.30): Y 
    HYDROGEN SELENIDE (as Se): 10LBSTPQ  SARA SECTION 304
    (40CFR355.40): Y  HYDROGEN SELENIDE (as Se): 10LBSRQ  SARA SECTION
    313 (40CFR372.65): Y  HYDROGEN SELENIDE (as Se)		       
	SARA HAZARD CATEGORIES, SARA SECTIONS 311/312 (40CFR370.21): 
    ACUTE: Y  CHRONIC: N  FIRE: Y  REACTIVE: Y	SUDDEN RELEASE: Y
Federal Regulatory Information:TSCA INVENTORY STATUS:Y OSHA PROCESS
    SAFETY (29CFR1910.119): Y HYDROGEN SELENIDE (as Se): 150LBSTQ
State Regulatory Information: California Proposition 65: N

=======================  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
 document should seek competent professional advice to verify and
 assume responsibility for the suitability of this information to their
 particular situation.