Product ID:HYDROGEN SELENIDE
MSDS Date:Jan 24 1989
MSDS Number: EEEIE
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

Telephone: (USA) 973-257-1100, (WHITBY) 905-668-3570, (EDMONTON)

HYDROGEN SELENIDE

CAS: 7783-07-5

Fraction By Weight: 100.0%

Medical Cond Aggravated by Exposure:

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.

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.

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:

Other Precautions:

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)

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 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.

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.

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

Disclaimer (provided with this information by the compiling agencies):
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.

Ecological:Not available

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

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