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SELENIUM HEXAFLUORIDE ICSC: 0947
Date of Peer Review: October 2000

Selenium fluoride
(cylinder)
CAS # 7783-79-1 SeF6
RTECS # VS9450000 Molecular mass: 193.0
UN # 2194
EC Index # 034-002-00-8
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.

In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION

In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
STRICT HYGIENE!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Corrosive. Cough. Sore throat. Headache. Nausea. Shortness of breath.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
Skin Redness. Pain. ON CONTACT WITH LIQUID: FROSTBITE.
Protective gloves. Cold-insulating gloves.
ON FROSTBITE: rinse with plenty of water, do NOT remove 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 PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Ventilation. NEVER direct water jet on liquid. Gas-tight chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment.
EU Classification
Symbol: T, N
R: 23/25-33-50/53
S: (1/2-)-20/21-28-45-60-61
Note: [A]
UN Classification
UN Hazard Class: 2.3
UN Subsidiary Risks: 8

EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-20G2TC
Fireproof if in building. Cool. Ventilation along the floor. Separated from food and feedstuffs.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
SELENIUM HEXAFLUORIDE ICSC: 0947
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS COMPRESSED LIQUEFIED GAS

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

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as Se) 0.05 ppm as TWA; (ACGIH 2004).
MAK: (as Se) (Inhalable fraction) 0.05 mg/m; Peak limitation category: II(4); Carcinogen category: 3B; Pregnancy risk group: C; (DFG 2004).
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.

PHYSICAL PROPERTIES
Boiling point: -34.5C
Sublimation point: -46C
Melting point: -39C
Solubility in water: slow reaction
Relative vapour density (air = 1): 6.7
ENVIRONMENTAL DATA
The substance is harmful to aquatic organisms.
NOTES
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 is therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered. Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor 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
IPCS, CEC 2005