ICSC 1242 - POTASSIUM HEXAFLUOROSILICATE

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POTASSIUM HEXAFLUOROSILICATE	ICSC: 1242 (June 2011)
Potassium fluorosilicate Potassium silicofluoride Dipotassium hexafluorosilicate

CAS #: 16871-90-2

UN #: 2655

EC Number: 240-896-2

	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	PREVENTION	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. 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 DANGER Toxic if swallowed May cause damage to blood and cardiovascular system May cause damage to teeth and bones 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.

POTASSIUM HEXAFLUOROSILICATE

ICSC: 1242

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance WHITE CRYSTALS OR FINE 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: K₂SiF₆ Molecular mass: 220.3 Relative density (water = 1): 2.3 Solubility in water, g/100ml at 20°C: 0.18 (poor)

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
WHITE CRYSTALS OR FINE 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: K₂SiF₆
Molecular mass: 220.3
Relative density (water = 1): 2.3
Solubility in water, g/100ml at 20°C: 0.18 (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.

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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