Agent Name

Potassium hexafluorosilicate

CAS Number

16871-90-2

Formula

F6-Si.2K

Major Category

Metals

Synonyms

Dipotassium hexafluorosilicate(2-); Potassium fluosilicate; Potassium silicofluoride; Dipotassium hexafluorosilicate; Silicate(2-), hexafluoro-, dipotassium; Silicate(2-), hexafluoro-, potassium (1:2); Potassium fluorosilicate; [ChemIDplus] FLUOROSILICATE DE POTASSIUM; FLUOSILICATE DE POTASSIUM; SILICOFLUORURE DE POTASSIUM; [IUCLID] UN2655

Category

Metals, Inorganic Compounds

Description

White solid; [Merck Index] White powder; [Alfa Aesar MSDS]

Sources/Uses

Used to make opalescent glass, in porcelain enamels, insecticides, and aluminum metallurgy; [Merck Index]

Comments

Causes flaccid paralysis, ataxia, and muscle contraction in oral lethal-dose studies of mice and rats; [RTECS] Hydrolyzed by hot water producing potassium fluoride, hydrogen fluoride, and silicic acid; A severe irritant; [Merck Index] A skin, eye, and respiratory tract irritant; May have effects on calcium metabolism; Chronic exposure may cause fluorosis; [ICSC] Forms hydrofluoric acid when dissolved in water; An irritant; Toxic by ingestion, inhalation, and skin absorption; [Alfa Aesar MSDS] See "Sodium hexafluorosilicate."

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

IDLH (NIOSH)

250 mg/m3, as F

Links to Other NLM Databases
Toxicity Information

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Chemical Information

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Related Information in HazMap
Processes

Industrial Processes with risk of exposure:

Activities

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