Agent Name

Tungsten hexafluoride

CAS Number

7783-82-6

Formula

F6-W

Major Category

Toxic Gases & Vapors

Synonyms

Tungsten fluoride (WF6); UN2196; [ChemIDplus]

Category

Corrosive Gases

Description

Colorless gas or light-yellow liquid that decomposes in water; [Hawley]

Sources/Uses

Used in the application of tungsten coatings; Used in chemical synthesis; [NJ-HSFS]

Comments

Hydrolyzes to HF after contact with water or moisture; Corrosive to skin, eyes, and respiratory tract; Inhalation can cause acute pulmonary edema; [CHEMINFO MSDS]

Exposure Assessment
BEI

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

TIH

Yes

TLV (ACGIH)

3 mg/m3, as W, respirable particulate matter (2.5 mg/m3, as F)

PEL (OSHA)

2.5 mg/m3, as F

MAK

1 mg/m3, as F, inhalable fraction

Lethal Concentration

LC50 (rat) = 1,430 mg/m3

Explanatory Notes

See exposure limits for soluble "Tungsten and compounds" and "Hydrogen fluoride"; Boiling point = 67 deg F; Melting point = 37 deg F; [CAMEO]

Adverse Effects
Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Toxicity Information

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Chemical Information

Search ChemIDplus

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: