information Related products Suppliers

Hydrogen selenide(H2Se)

MATERIAL
Linde Gas LLC (216) 642-6600
LindeGAS,LLC (216) 642-6600
AGA Gas INC. SAFETY
P.O. Box 94737 WOODS BLV P.O. Box 94737
6055 ROCKSIDE DATA SHEET
Cleveland, Ohio 44101
Cleveland, Ohio 44101
P.O. BOX 94737
www.us.lindegas.com
www.us.lindegas.com
CLEVELAND, OH 44101-4737 No. 139

PRODUCT NAME CAS #
7783-07-5
Hydrogen Selenide
DOT I.D. No.:
UN 2202 RO 10(4.54)
TRADE NAME AND SYNONYMS
Hydrogen selenide, anhydrous (D.O.T.)
DOT Hazard Class:
Division 2.3
CHEMICAL NAME AND SYNONYMS

Formula
H2Se
Hydrogen Selenide; Selenium Hydride
ISSUE DATES AND REVISIONS Chemical Family:
Nonmetal Hydride
Revised May 1998

HEALTH HAZARD DATA
TIME WEIGHTED AVERAGE EXPOSURE LIMIT
TWA (as Se) = 0.05 Molar PPM (ACGIH 1997). OSHA 1995 PEL (8 Hr. TWA) = (as Se) =
0.05 Molar PPM.
SYMPTOMS OF EXPOSURE

Inhalation of low levels causes garlic odor of breath, metal taste, nausea, dizziness and extreme lassitude and general malaise. It is
irritating to the skin, eyes and mucous membranes causing itching and a rash. Olfactory fatigue renders continued detection of low
levels by odor unreliable. It reacts with the nasal passages and bronchiole resulting in pneumonitis. Exposure to very low toxic
concentrations results in convulsive coma followed by death due to respiratory failure.

TOXICOLOGICAL PROPERTIES
Hydrogen selenide is known to have a hemolytic effect. It is reported to be one of the most toxic substances known. It is
known to cause damage to the liver and the spleen. Its toxicity affects the skin and eyes on exposure or contact.

Hydrogen selenide is not listed in the IARC, NTP or by OSHA as a carcinogen or potential carcinogen.

Persons in ill health where such illness would be aggravated by exposure to hydrogen selenide should not be allowed
to work with or handle this product.

RECOMMENDED FIRST AID TREATMENT

PROMPT MEDICAL ATTENTION IS MANDATORY IN ALL CASES OF OVEREXPOSURE TO HYDROGEN
SELENIDE. RESCUE PERSONNEL SHOULD BE EQUIPPED WITH SELF-CONTAINED BREATHING APPARATUS
AND BE COGNIZANT OF EXTREME FIRE AND EXPLOSION HAZARD.

Inhalation: Extreme fire hazard when rescuing semiconscious or unconscious persons due to flammability of hydrogen
selenide. Avoid use of rescue equipment which might contain ignition sources or cause static discharge. Move affected
person to an uncontaminated area. If breathinc~?? has stopped, give assisted respiration. Oxygen or a mixture of 5%
carbon dioxide in oxygen should be administered by a qualified person. Keep victim warm and calm. Seek immediate
medical assistance. Further treatment should be symptomatic and supportive.
(Continued on

Information contained in this material safety data sheet is offered without charge for use by technically qualified personnel at their discretion and
risk. All statements, technical information and recommendations contained herein are based on tests and data which we believe to be reliable, but
the accuracy or completeness thereof is not guaranteed and no warranty of any kind is made with respect thereto. This information is not intended
as a license to operate under or a recommendation to practice or infringe any patent of this Company or others covering any process, composition
of matter or use.
Since the Company shall have no control of the use of the product described herein, the Company assumes no liability for loss or damage incurred
from the proper or improper use of such product.
Hydrogen Selenide

HAZARDOUS MIXTURES OF OTHER LIQUIDS, SOLIDS, OR GASES
Flammable over a wide range in ai r. It becomes dangerously reactive when mixed with nitric acid or other strong
oxidizers.

PHYSICAL DATA
BOILING POINT LIQUID DENSITY AT BOILING POINT
-43.5oF (-41.4oC) 125.1 lb/ft3 (2004 kg/m3)
VAPOR PRESSURE GAS DENSITY AT 70??F. 1 atm
@ 70oF (21.1oC) = 139 psia (960 kPa) .2745 lb/ft3 (4.398 kg/m3)
SOLUBILITY IN WATER FREEZING POINT
Reacts to form a hydrate -86.3oF (-65.7oC)
EVAPORATION RATE SPECIFIC GRAVITY (AIR=1)
N/A (Gas) @ 70oF (21.1oC) =3.66
Colorless gas with a foul, penetrating odor
APPEARANCE AND ODO

FIRE AND EXPLOSION HAZARD DATA
AUTO IGNITION TEMPERATURE
FLASH POINT (Method used) FLAMMABLE LIMITS % B VOLUME (See Y
N/A (Gas) Unknown Unknown Unknown
LE UEL
ELECTRICAL CLASSIFICATION
EXTINGUISHING MEDIA
Unknown
Carbon dioxide, dry chemical or water spray
SPECIAL FIRE FIGHTING PROCEDURES
Shut o ff flow of gas. Cool surrounding fire-exposed containers with water spra y. Fire fighters should use self-contained
breathing apparatus.

UNUSUAL FIRE AND EXPLOSION HAZARDS
Hydrogen selenide is heavier than air so may accumulate in low spots and may ??travel?? a considerable distance to a
flame or other source of ignition.

REACTIVITY DATA
STABILITY CONDITIONS TO AVOI Unstable Avoid heat, flame or other sources of ignition

Stable X
INCOMPATIBILITY (Materials toavoid)
Concentrated nitric acid, chlorine, nitrogen trifluoride, oxygen difluoride or other strong
oxidizinq agents.
HAZARDOUS DECOMPOSITION PRODUCTS Begins to dissociate to its elements above 320oF (160oC)

HAZARDOUS POLYMERIZATION CONDITIONS TO AVOI
May Occur
None
Will Not Occur X

SPILL OR LEAK PROCEDURES
STEPS TO BE TAKEN IN CASE MATERIAL IS RELEASED OR SPILLE
Evacuate all personnel from a ffected area. Use appropriate protective equipment. If leak is in use r??s equipment, be
certain to purge piping with an inert gas prior to attempting repairs. If leak is in container or container valve, contact
your closest supplier location.

WASTE DISPOSAL METHO Do not attempt to dispose of waste or unused quantities. Return in the shipping container properly labeled, with any
valve outlet plugs or caps secured and valve protection cap in place to your suppiler for proper disposal. For
emergency disposal, contact your closest supplier location.

2
Hydrogen Selenide
SPECIAL PROTECTION INFORMATION
Positive pressure air line with mask or self-contained breathing apparatus should be available for
RESPIRATORY PROTECTION
(Specify type)
emergency use.
VENTILATION LOCAL EXHAUST SPECIAL
N/A
To prevent accumulation above the TWA
Hood with forced ventilation MECHANICAL (Gen.) OTHE N/A
N/A
PROTECTIVE GLOVES
Neoprene or butyl rubber, PVC, polyethylene
EYE PROTECTION
Safety goggles or glasses
OTHER PROTECTIVE EQUIPMENT
Safety shoes, safety shower, eyewash ??fountain??

SPECIAL PRECAUTIONS*
SPECIAL LABELING INFORMATION

DOT Shipping Name: Hydrogen selenide, anhydrous DOT Hazard Class: Division 2.3
DOT Shipping Labels: Toxic Gas, Flammable Gas I.D. No.: UN 2202; RQ 10(4.54)
SPECIAL HANDLING RECOMMENDATIONS

Use only in well-ventilated areas. Valve protection caps must remain in place unless container is secured with valve
outlet piped to use point. Do not drag, slide or roll cylinders. Use a suitable hand truck for cylinder movement. Use a
pressure reducing regulator when connecting cylinder to lower pressure (<350 psig) piping or systems. Do not heat
cylinder by any means to increase the discharge rate of product from the cylinder. Use a check valve or trap in the
discharge line to prevent hazardous back flow into the cylinder. Close valve after each use and when empty.

For additional handling recommendations, consult Compressed Gas Association??s Pamphlet P-1.

SPECIAL STORAGE RECOMMENDATIONS

Protect cylinders from physical damage. Store in cool, dry, well-ventilated area of noncombustible construction away
from heavily trafficked areas and emergency exits. Do not allow the temperature where cylinders are stored to exceed
125oF (52oC). Cylinders should be stored upright and firmly secured to prevent falling or being knocked over. Full and
empty cylinders should be segregated. Use a ??first in - first out?? inventory system to prevent full cylinders being stored
for excessive periods of time. Post ??No Smoking or Open Flames?? signs in the storage or use area. There should be no
sources of ignition in the storage or use area.

For additional storage recommendations, consult Compressed Gas Association??s Pamphlet P-1.

SPECIAL PACKAGING RECOMMENDATIONS
Hydrogen selenide is best handled in carbon steel, stainless steel, Monel?, and Hastelloy? A, B and C. Teflon? and
Kel-F? are the preferred gasket materials; Viton? and Nylon? are satisfactory. The product can also be handled in
ordinary glass, Pyrex? and quartz.

OTHER RECOMMENDATIONS OR PRECAUTIONS
Earth-ground and bond all lines and equipment associated with the hydrogen selenide system. All electrical equipment
should be non-sparking or explosion proof. Do not rely on the olfactory sense to detect the presence of hydrogen
selenide. Analytical devices and instrumentation are readily available for this purpose. Perform frequent analytical tests
to be certain that the TWA is not being exceeded.

(Continued on
*Various Government Agencies (i.e. Department of Transportation, Occupational Safety and Health Administration, Food and Drug Administration
3
and others) may have specific regulations concerning the transportation, handling, storage or use of this product which will not be reflected in this
data sheet. The customer should review these regulations to ensure that he is in full compliance.
Hydrogen Selenide

HEALTH HAZARD DATA
RECOMMENDED FIRST AID TREATMENT: (Continued)

Eye Contact: PERSONS WITH POTENTIAL EXPOSURE TO HYDROGEN SELENIDE SHOULD NOT WEA CONTACT LENSES.

Flush contaminated eye(s) with copious quantities of water. Part eyelids with fingers to assure complete flushing.
Continue for at least 15 minutes.

Dermal Contact: Remove affected clothing and flush affected area with copious quantities of water. Continue for minimum
of 15 minutes.

SPECIAL PRECAUTIONS
OTHER RECOMMENDATIONS OR PRECAUTIONS: (Continued)

Compressed gas cylinders should not be refilled except by qualified producers of compressed gases. Shipment of a
compressed gas cylinder which has not been filled by the owner or with his (written) consent is a violation of Federal Law
(49CFR).

Always secure cylinders in an upright position before transporting them. NEVER transport cylinders in trunks of vehicles,
enclosed vans, truck cabs or in passenger compartments. Transport cylinders secured in open flatbed or in open pick-up
type vehicles.

Reporting under SARA, Title III, Section 313 not required.

NFPA 704 No. for hydrogen selenide = 4 4 1 None

4

;