Silicon tetrafluoride

Synonyms

Perfluorosilane; Silane, tetrafluoro-; Silicon fluoride (SiF4); Tetrafluorosilane; UN1859; [ChemIDplus]

Category

Corrosive Gases

Description

Colorless gas with a pungent odor; [HSDB]

Sources/Uses

Used to manufacture silane, silicon for electronics, and fluosilicic acid; Used as a sealant in oil well drilling; [HSDB]

Comments

On contact with water, may hydrolyze to form fluosilicic acid and silicon dioxide. May be corrosive to the skin, eyes, and respiratory tract; Inhalation may cause pulmonary edema; Chronic exposure may cause fluorosis; [CHEMINFO MSDS] See "Fluorosilic acid." See "FLUORIDES."

Biomedical References

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

Yes

2.5 mg/m3, as F

2.5 mg/m3, as F

1 mg/m3, as F, inhalable fraction

LC50 (rat) = 2,272 ppm

Explanatory Notes

For occupational exposure limits, see "Fluorides."

will not burn

Yes

Skin burns

Diseases

Occupational diseases associated with exposure to this agent:

• Pneumonitis, toxic

Processes

Industrial Processes with risk of exposure:

• Petroleum Production and Refining