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Material Safety Data Sheets (MSDS)
13.5 Sodium hexafluorosilicate
Name:
SODIUM HEXAFLUOROSILICATE (sodium fluorosilicate, disodium hexafluorosilicate disodique)
Formula: Na
2
SiF
6
Hazard class: 6.1 No. UN: 2674
CAS N° 16893-85-9
PHYSICAL PROPERTIES
White granular powder
Density (20 °C) approx. 2,7 g cm
-3
Slightly soluble in water (6g 1-1 to 20°C)
FIRE AND EXPLOSION HAZARD When heated to decomposition it may emit hydrogen fluoride.
HEALTH HAZARD Classification of risk - toxic.
Avoid contact with skin.
Avoid contact with eyes.
Keep locked up.
Keep out of reach of children.
Toxic by ingestion and skin contact
Toxic by inhalation
Irritating to skin and eyes, may cause damage if exposure is prolonged.
Occupational exposure standard, long term exposure limit (8h TWA) 2,5 mg m
-3
SAFETY PRECAUTIONS - FIRST AID If the casualty feels unwell, seek medical advice and show label where possible.
EYES Rinse immediately and thoroughly with water for at least 10 minutes. Obtain
medical attention.
LUNGS Remove from exposure, rest and keep warm. In severe cases, or if exposure has
been great obtain medical attention.
MOUTH Wash out mouth thoroughly with water and give plenty of water to drink. Obtain
medical attention.
SKIN Wash skin thoroughly with water and give plenty of water to drink. Obtain medical
attention.
CHEMICAL HAZARD AND STABILITY Contact with acids liberates toxic gas.
PROTECTIVE MEASURES (as appropriate to quantity handled)
RESPIRATOR Dust respirator.
VENTILATION Extraction hood.
GLOVES Rubber or plastic.
EYE PROTECTION Goggles or face shield.
OTHERS MEASURES Plastic apron, sleeves, boots - if handling large quantities.
SPILLAGE HANDLING
PRECAUTIONS Wear appropriate protective clothing.
Mix with sand, transfer carefully to canister and arrange removal by disposal
company. Wash site of spillage thoroughly with water and detergent.
For large spillages liquids should be contained with sand or earth and both liquids
and solids transferred to salvage canisters. Any residues should be treated as for
small spillages.
If material has entered surface drains it may be necessary to inform Local
Authorities, including fire services flammable.
WASTE DISPOSAL Dispose in safe manner consistent with Local Authorities or national chemical
Waste Regulation. For guidelines for disposal in the UK consult the requirements of
the Control of Pollution (special wastes) regulations (1980 SI 1709).
The information in this sheet is believed to be correct at the time of printing. The details should be reviewed periodically and
should be checked for special uses.
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