International Chemical Safety Cards

POTASSIUM HEXAFLUOROSILICATE ICSC: 1242
POTASSIUM HEXAFLUOROSILICATE
Potassium fluorosilicate
Potassium silicofluoride
Dipotassium hexafluorosilicate
K2SiF6
Molecular mass: 220.3
CAS # 16871-90-2
RTECS # VV8400000
ICSC # 1242
UN # 2655
EC # 009-012-00-0
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.

In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION


 
EXPOSURE
PREVENT DISPERSION OF DUST!

INHALATION Burning sensation. Cough. Sore throat (see Ingestion).
Avoid inhalation of fine dust and mist. Local exhaust or breathing protection.
Fresh air, rest. Refer for medical attention.
SKIN Redness. Pain.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower.
EYES Redness. Pain.
Safety goggles or eye protection in combination with breathing protection if powder.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
INGESTION Abdominal cramps. Burning sensation. Nausea. Vomiting.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Do NOT wash away into sewer. Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place (extra personal protection: P3 filter respirator for toxic particles).
Separated from acids, food and feedstuffs.
Do not transport with food and feedstuffs.
T symbol
R: 23/24/25
S: (1/2-)26-45
Note: A
UN Classification.
UN Hazard Class: 6.1
UN Packing Group: III
Marine pollutant.
SEE IMPORTANT INFORMATION ON BACK
ICSC: 1242 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

POTASSIUM HEXAFLUOROSILICATE ICSC: 1242

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M

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A

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D

A

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A
PHYSICAL STATE; APPEARANCE:
WHITE CRYSTALS OR FINE POWDER.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating producing toxic and corrosive fumes including fluorine. Reacts with concentrated acids producing corrosive hydrogen fluoride (see ICSC # 0283).

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV: ppm; 2.5 mg/m3 as F (as TWA) (ACGIH 1994-1995).


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

INHALATION RISK:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the calcium metabolism , resulting in cardiac disorders and impaired function. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The substance may have effects on the bone , resulting in fluorosis.
PHYSICAL
PROPERTIES
 Melting point (decomposes): see Notes
Relative density (water = 1): 2.3 		Solubility in water, g/100 ml at 19°C: 6.9
ENVIRONMENTAL
DATA
N O T E S
Temperature of decomposition unknown in literature.
Transport Emergency Card: TEC (R)-61G11b
ADDITIONAL INFORMATION


ICSC: 1242 POTASSIUM HEXAFLUOROSILICATE
© IPCS, CEC, 1993
IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use.