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SODIUM HEXAFLUOROSILICATEICSC: 1243
June 2011
CAS #: 16893-85-9Sodium silicofluoride
Disodium hexafluorosilicate
Sodium fluorosilicate
UN #: 2674
EINECS #: 240-934-8

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.        In case of fire in the surroundings, use appropriate extinguishing media.   

 PREVENT DISPERSION OF DUST!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Burning sensation. Cough. Sore throat. See Ingestion.  Avoid inhalation of dust. Use 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. Blurred vision.  Wear 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 refer for medical attention. 
Ingestion Abdominal cramps. Burning sensation. Nausea. Vomiting. Sore throat. Weakness. Convulsions. Shock or collapse.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Do NOT induce vomiting. See Notes. Refer immediately for medical attention. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered sealable containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

skull;toxiccancer;health haz
DANGER
Toxic if swallowed
May cause damage to blood and cardiovascular system
Causes damage to the bones and the teeth through prolonged or repeated exposure 

Transportation
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 

STORAGE
Separated from acids and food and feedstuffs. 
PACKAGING
Do not transport with food and feedstuffs. 
SODIUM HEXAFLUOROSILICATE ICSC: 1243
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS-TO-WHITE GRANULAR POWDER. 

Physical dangers
 

Chemical dangers
Decomposes on heating. This produces toxic and corrosive fumes including fluorine. Reacts with acids. This produces corrosive hydrogen fluoride (see ICSC 0283). 

Formula: Na2SiF6
Molecular mass: 188.0
Relative density (water = 1): 2.7
Solubility in water, g/100ml at 20°C: 0.76 (poor) 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by ingestion. 

Effects of short-term exposure
The substance may cause effects on the blood and calcium metabolism. This may result in cardiac disorders. Medical observation is indicated. See Notes. 

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed. 

Effects of long-term or repeated exposure
The substance may have effects on the bones and teeth. This may result in fluorosis. 


Occupational exposure limits
 

ENVIRONMENT
 

NOTES
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: T; R: 23/24/25; S: (1/2)-26-45; Note: A 

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       Toxicological Abbreviations