Ammonium fluosilicate
Agent Name
Ammonium fluosilicate
CAS Number
16919-19-0
Formula
F6-Si.2H4-N
Major Category
Metals
Synonyms
Ammonium fluorosilicate; Ammonium hexafluorosilicate; Ammonium silicofluoride; Ammonium silicon fluoride; Diammonium fluorosilicate; Diammonium fluosilicate; Diammonium fluosilicate ((NH4)2SiF6); Diammonium hexafluorosilicate; Diammonium hexafluorosilicate(2-); Diammonium silicon hexafluoride; Fluorosilicic acid, ammonium salt; LPE 6; Silicate(2-), hexafluoro-, diammonium; Silicate, hexafluoro-, diammonium; [ChemIDplus] UN2854
Category
Metals, Inorganic Compounds
Description
White solid; [Hawley] Colorless crystals, soluble in water; [MSDSonline]
Sources/Uses
Used as an insecticide, miticide, mothproofing agent, wood preservative, and disinfectant (brewing industry); Also used in soldering flux, laundry sours, glass etching, light metal casting, electroplating, and dental prophylaxis; [HSDB]
Comments
A strong skin and eye irritant; [Hawley] Toxic by inhalation, ingestion, and skin contact; [eChemPortal: ESIS] LD50 (mouse) = 70 mg/kg; Causes ataxia and flaccid paralysis without anesthesia; [RTECS) "Toxic and irritating hydrogen fluoride, silicon tetrafluoride and oxides of nitrogen may form in fires." [CHRIS] See "FLUORIDES."
Biomedical References
Exposure Assessment
BEI
Fluorides in urine = 2 mg/L prior to shift or 3 mg/L at end of shift; (Repeated measurements recommended.)
TLV (ACGIH)
2.5 mg/m3, as F
PEL (OSHA)
2.5 mg/m3, as F
MAK
1 mg/m3, inhalable fraction, as F
Diseases, Processes, and Activities Linked to This Agent
Processes
Industrial Processes with risk of exposure: