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SODIUM HEXAFLUOROSILICATE ICSC: 1243
Date of Peer Review: October 1994

Sodium fluorosilicate
Sodium silicofluoride
Disodium hexafluorosilicate
CAS # 16893-85-9 Na2SiF6
RTECS # VV8410000 Molecular mass: 188.0
UN # 2674
EC Index # 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: use appropriate extinguishing media.
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 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. Personal protection: P3 filter respirator for toxic particles.
Do not transport with food and feedstuffs. Marine pollutant.
EU Classification
Symbol: T
R: 23/24/25
S: (1/2-)-26-45
Note: [A]
UN Classification
UN Hazard Class: 6.1
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT5-III
Separated from acids, food and feedstuffs.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
SODIUM HEXAFLUOROSILICATE ICSC: 1243
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
WHITE GRANULAR POWDER.

CHEMICAL DANGERS:
The substance decomposes on heating producing toxic and corrosive fumes including fluorine. Reacts with concentrated acids to produce corrosive hydrogen fluoride (see ICSC0283).

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as F) 2.5 mg/m as TWA; A4 (not classifiable as a human carcinogen); BEI issued; (ACGIH 2004).
MAK: (as F) (Inhalable fraction) 1 mg/m; Peak limitation category: I(4); skin absorption (H); Pregnancy risk group: C; (DFG 2005).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

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

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes, the skin and the respiratory tract. The substance may cause effects on the calcium metabolism, resulting in cardiac disorders and impaired functions. 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): 2.7
Solubility in water: none
ENVIRONMENTAL DATA

NOTES
Melts at red heat with decomposition. Card has been partly updated in April and October 2005. See sections Occupational Exposure Limits, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor 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
IPCS, CEC 2005