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SELENIUM HEXAFLUORIDE

ICSC: 0947

Selenium fluoride
SeF6
Molecular mass: 193.0
(cylinder)
ICSC # 0947 		CAS # 7783-79-1
RTECS # VS9450000
UN # 2194
EC # 034-002-00-8
March 10, 2000 Validated

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

STORAGE

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.
Fireproof if in building. Cool. Ventilation along the floor. Separated from food and feedstuffs .

Note: A
T symbol
N symbol
R: 23/25-33-50/53
S: 1/2-20/21-28-45-60-61
UN Hazard Class: 2.3
UN Subsidiary Risks: 8
ICSC: 0947 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

SELENIUM HEXAFLUORIDE

ICSC: 0947

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
COLOURLESS COMPRESSED LIQUEFIED GAS

PHYSICAL DANGERS:


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/m3;
Peak limitation category: II(4); Carcinogen category: 3B; Pregnancy risk group: C;
(DFG 2004).
OSHA PEL: TWA 0.05 ppm (0.4 mg/m3)
NIOSH REL: TWA 0.05 ppm
NIOSH IDLH: 2 ppm See: 7783791


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:

PHYSICAL
PROPERTIES

Boiling point: -34.5°C
Sublimation point: -46°C
Melting point: -39°C

Solubility in water: slow
reaction
Relative vapour density (air = 1): 6.7

ENVIRONMENTAL
DATA

The substance is harmful to aquatic organisms.

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 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.
Transport Emergency Card: TEC (R)-20G2TC

ADDITIONAL INFORMATION



ICSC: 0947 SELENIUM HEXAFLUORIDE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, 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. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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