Agent Name

Selenium hexafluoride

CAS Number

7783-79-1

Formula

F6-Se

Major Category

Toxic Gases & Vapors

Synonyms

Selenium fluoride (SeF6); Selenium fluoride (SeF6), (OC-6-11)-; [ChemIDplus] UN2194

Category

Corrosive Gases

Description

Colorless liquefied gas under pressure; [ICSC]

Sources/Uses

Used as an electrical insulator in arc light electrodes, electric rectifiers, and semiconductors; [ACGIH]

Comments

Inhalation studies in animals show that 4 hour exposures to 10 ppm are lethal; 4 hour exposures to 5 ppm cause pulmonary edema; and 4 hour exposures to 1 ppm are without apparent effect. [ACGIH] Decomposes into selenium and hydrogen fluoride on contact with moisture; [ATSDR Medical Management] Liquid may cause frostbite; A corrosive substance that can cause pulmonary edema; [ICSC] See "Selenium" and "Hydrogen fluoride."

Reference Link

ATSDR Medical Management - Selenium Hexafluoride

Exposure Assessment
BEI

Fluorides in urine = 2 mg/L prior to shift or 3 mg/L at end of shift; (Repeated measurements recommended.)

Skin Designation (ACGIH)

Insufficient data

TIH

Yes

TLV (ACGIH)

0.4 mg/m3, as Se (2.5 mg/m3, as F)

PEL (OSHA)

0.4 mg/m3, as Se (2.5 mg/m3, as F)

MAK

1 mg/m3, inhalable fraction, as F

IDLH (NIOSH)

1 mg/m3, as Se

Excerpts from Documentation for IDLHs

Other animal data: It has been reported that 5 ppm for 4 hours resulted in pulmonary edema from which rabbits, guinea pigs, rats, and mice survived [Kimmerle 1960].

Lethal Concentration

LCLo (rat) = 10 ppm/1H

Adverse Effects
Toxic Pneumonitis

Yes

Neurotoxin

Other CNS Neurotoxin

Hepatotoxin

Hepatotoxin, Secondary

Reproductive Toxin

Yes

Dermatotoxin

Skin Burns

IARC Carcinogen

Not Classifiable

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: