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Registry of Toxic Effects of Chemical Substances (RTECS)

Silicate(2-), hexafluoro-, dipotassium

RTECS #

VV8400000

CAS #

16871-90-2

Updated

April 2013

Molecular Weight

220.29

Molecular Formula

F6Si·2K

Synonyms

Dipotassium hexafluorosilicate(2-)
Potassium fluosilicate
Potassium hexafluorosilicate
Potassium silicofluoride

Acute Toxicity Data and References

Route/OrganismDoseEffectReference
oral/guinea pig lethal dose (50 percent kill): 500 mg/kg28ZEAL 4,327,1969
oral/mouse lethal dose (50 percent kill): 70 mg/kgPeripheral Nerve and Sensation: Flaccid paralysis without anesthesia (usually neuromuscular blockage)

Behavioral: Ataxia

Behavioral: Muscle contraction or spasticity
GISAAA 53(11),80,1988
oral/rat lethal dose (50 percent kill): 156 mg/kgPeripheral Nerve and Sensation: Flaccid paralysis without anesthesia (usually neuromuscular blockage)

Behavioral: Ataxia

Behavioral: Muscle contraction or spasticity
GISAAA 53(11),80,1988
subcutaneous/frog lowest published lethal dose: 448 mg/kgCRSBAW 124,133,1937
subcutaneous/guinea pig lowest published lethal dose: 500 mg/kgCRSBAW 124,133,1937

Other Multiple Dose Data and References

Route/OrganismDoseEffectReference
oral/rat lowest published toxic dose: 290 mg/kg/30D- intermittentKidney, Ureter, and Bladder: Other changes in urine composition

Musculoskeletal: Other changes

Biochemical: Enzyme inhibition, induction, or change in blood or tissue levels: Phosphatases
GISAAA 53(11),80,1988

Reviews

OrganizationStandardReference
TOXICOLOGY REVIEWAMSSAQ 400,5,1963

Standards and Regulations

OrganizationStandardReference
Occupational Exposure Limit-AUSTRALIAtime-weighted average 2.5 mg(F)/m3, JUL2008
Occupational Exposure Limit-BELGIUMtime-weighted average 2.5 mg(F)/m3, MAR2002
Occupational Exposure Limit-FINLANDtime-weighted average 2.5 mg(F)/m3, NOV2011
Occupational Exposure Limit-GERMANYMAK 1 mg(F)/m3, inhal, 2011
Occupational Exposure Limit-HUNGARYtime-weighted average 2.5 mg(F)/m3, short term exposure limit 10 mg(F)/m3, Skin, SEP2000
Occupational Exposure Limit-MEXICOtime-weighted average 2.5 mg(F)/m3, 2004
Occupational Exposure Limit-NEW ZEALANDtime-weighted average 2.5 mg(F)/m3, JAN2002
Occupational Exposure Limit-RUSSIAshort term exposure limit 0.2 mg/m3, JUN2003
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Construction)8H time-weighted average 2.5 mg(F)/m3CFRGBR 29,1926.55,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Federal Contractors)8H time-weighted average 2.5 mg(F)/m3CFRGBR 41,50-204.50,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (General Industry)8H time-weighted average 2.5 mg(F)/m3CFRGBR 29,1910.1000,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards)8H time-weighted average 2.5 mg(F)/m3CFRGBR 29,1915.1000,1993

NIOSH Documentation and Surveillance

OrganizationStandardReference
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Level TO FLUORIDES, INORGANIC-air10H time-weighted average 2.5 mg(F)/m3NIOSH* DHHS #92-100,1992
National Occupational Exposure Survey 1983Hazard Code M0826; Number of Industries 18; Total Number of Facilities 680; Number of Occupations 9; Total Number of Employees Exposed 4235; Total Number of Female Employees Exposed 687
National Occupational Hazard Survey 1974Hazard Code M0826; Number of Industries 7; Total Number of Facilities 227; Number of Occupations 15; Total Number of Employees Exposed 2145

Status in Federal Agencies

OrganizationReference
EPA TSCA Section 8(b) CHEMICAL INVENTORY
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