Product ID:HYDROGEN SELENIDE SDS2
MSDS Date:Aug 03 2001
MSDS Number: EEEIF
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

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

HYDROGEN SELENIDE

CAS: 7783-07-5

Fraction By Weight: >99%

PROPRIETARY SORBENT (PROPRIETARY CARBON MEDIA)

Fraction By Weight: <1%

Reports of Carcinogenicity:NTP:No IARC:No OSHA:No
Health Hazards Acute and Chronic:INHALATION: SHORT TERM EXPOSURE:
irritation, sore throat, cough, difficulty breathing, lack of sense
of smell, nausea, vomiting, diarrhea, garlic odor, metallic taste,
weakness, dizziness, headache, fatigue, lung congestion, lung
damage, liver damage, potentially fatal if inhaled LONG TERM
EXPOSURE: irritation, vomiting, diarrhea, metallic taste, garlic
odor, dizziness, fatigue, weight loss, blood disorders SKIN
CONTACT: SHORT TERM EXPOSURE: irritation, frostbite LONG TERM
EXPOSURE: same as effects reported in short term exposure EYE
CONTACT: SHORT TERM EXPOSURE: irritation, frostbite, eye damage
LONG TERM EXPOSURE: same as effects reported in short term exposure
INGESTION: SHORT TERM EXPOSURE: ingestion of harmful amounts is
unlikely LONG TERM EXPOSURE: ingestion of harmful amounts is
unlikely
Medical Cond Aggravated by Exposure:

First Aid: INHALATION: If gas is inhaled, move victim to fresh air. If
breathing has stopped, give artificial respiration. If breathing is
weak, give oxygen. Get medical attention without delay. SKIN
CONTACT: If this chemical contacts the skin, immediately flush the
contaminated skin with soap and water. If clothing is contaminated,
immediately remove and flush the skin with soap and water. Get
medical attention promptly. Assume victim has also been exposed by
inhalation. EYE CONTACT: In case of eye contact, immediately flush
eyes with plenty of water for at least 30 minutes, occasionally
lifting the lower and upper lids. Get medical attention
immediately. INGESTION: Ingestion is not a route of exposure. 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. Heating of cylinder
beyond pressure relief.

Spill Release Procedures:Isolate area until gas has dispersed. Use
appropriate protective equipment including self-contained breathing
apparatus. Be certain to flush lines and enclosures with inert gas
before repairing. 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 Precautions:Store and handle in accordance with
all current regulations and standards. Protect from physical
damage. Avoid direct sunlight. Store in a cool, dry, well
ventilated area of non-combustible construction. Keep away from
cylinders of oxygen or other highly oxidizing or flammable
materials. Ship and store cylinders with outlet plug in place.
Subject to storage regulations: U.S. OSHA 29 CFR 1910.101. 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). See original container for storage recommendations. Keep
separated from incompatible substances.
Other Precautions:

Respiratory Protection:Respirators depend on exposure level. SCBA with
full face piece recommended during change outs and available in
case of emergency.
Ventilation:Exhausted process enclosure recommended to meet published
exposure limits. Use only in a well ventilated area.
Protective Gloves:Wear appropriate chemical resistant gloves.
Eye Protection:Wear safety glasses.
Other Protective Equipment:Wear appropriate chemical resistant
clothing.
Supplemental Safety and Health
HYDROGEN SELENIDE SDS2: 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:explodes
Appearance and Odor:PHYSICAL STATE:gas COLOR:colorless PHYSICAL
FORM:Solid proprietary carbon beads and toxic gas contained within
a sealed stainless steel cylinder. 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:Exposure to air.
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): D001. D003.

Toxicological Information:HYDROGEN SELENIDE SDS2: 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: PROPER SHIPPING NAME:
Hydrogen selenide, anhydrous ID NUMBER: UN2202 HAZARD CLASS OR
DIVISION: 2.3 LABELING REQUIREMENTS: Poison gas; Flammable gas
QUANTITY LIMITATIONS: PASSENGER AIRCRAFT OR RAILCAR: Forbidden
CARGO AIRCRAFT ONLY: Forbidden

SARA Title III Information: SARA TITLE III SECTION 302 EXTREMELY
HAZARDOUS SUBSTANCES (40 CFR 355.30): HYDROGEN SELENIDE (as Se):
10LBSTPQ SARA TITLE III SECTION 304 EXTREMELY HAZARDOUS SUBSTANCES
(40 CFR 355.40): HYDROGEN SELENIDE (as Se): 10LBSRQ SARA TITLE
III SARA SECTIONS 311/312 HAZARDOUS CATEGORIES (40 CFR 370.21):
ACUTE: Yes CHRONIC: No FIRE: Yes REACTIVE: Yes SUDDEN RELEASE:
Yes SARA TITLE III SECTION 313 (40 CFR 372.65): HYDROGEN
SELENIDE (as Se)
Federal Regulatory Information:CERCLA SECTIONS 102a/103 HAZARDOUS
SUBSTANCES (40 CFR 302.4): Not regulated. OSHA PROCESS SAFETY
(29CFR1910.119): HYDROGEN SELENIDE (as Se): 150LBSTQ
State Regulatory Information: California Proposition 65: Not regulated.