International Chemical Safety Cards

SELENIUM HEXAFLUORIDE ICSC: 0947

SELENIUM HEXAFLUORIDE
(cylinder)
SeF6
Molecular mass: 193
CAS # 7783-79-1
RTECS # VS9450000
ICSC # 0947
UN # 2194
EC # 034-002-00-8
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Not combustible.

In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION

In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position.
 
EXPOSURE
STRICT HYGIENE!
IN ALL CASES CONSULT A DOCTOR!
INHALATION Corrosive. Cough. Headache. Nausea. Shortness of breath. Sore throat.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration if indicated. Refer for medical attention.
SKIN Redness. Pain. ON CONTACT WITH LIQUID: FROSTBITE.
Cold-insulating gloves.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
EYES Corrosive. Redness. Pain. Blurred vision.
Face shield or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
INGESTION


SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Ventilation. NEVER direct water jet on liquid (extra personal protection: complete protective clothing including self-contained breathing apparatus).
Fireproof if in building. Cool. Ventilation along the floor.

T symbol
R: 23/25-33
S: 20/21-28-44
SEE IMPORTANT INFORMATION ON BACK
ICSC: 0947 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

SELENIUM HEXAFLUORIDE ICSC: 0947

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PHYSICAL STATE; APPEARANCE:
COLOURLESS COMPRESSED LIQUEFIED GAS.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating producing toxic and corrosive fumes including hydrogen fluoride, fluoride and selenium.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV (as Se): 0.05 ppm; mg/m3 (ACGIH 1990-1991).
MAK: 0.025 ppm; 0.2 mg/m3; (199?).


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:
A harmful concentration of this gas in the air will be reached very quickly on loss of containment.

EFFECTS OF SHORT-TERM EXPOSURE:
Corrosive. The substance is corrosive to the eyes and the respiratory tract. Inhalation of the gas may cause lung oedema (see Notes). Rapid evaporation of the liquid may cause frostbite.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the central nervous system, liver and kidneys.
PHYSICAL
PROPERTIES
 Boiling point: -34.5°C
Sublimation point: -46°C
Melting point: -39°C
Relative density (water = 1): 3.25 (at -25°C)
Solubility in water: none (see Notes)
ENVIRONMENTAL
DATA
N O T E S
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Immediate administration of an appropriate spray, by a doctor or a person authorized by him/her, should be considered. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
ADDITIONAL INFORMATION


ICSC: 0947 SELENIUM HEXAFLUORIDE
© IPCS, CEC, 1993
IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use.