|FLUOROSILICIC ACID||ICSC: 1233 (October 2004)|
| CAS #: 16961-83-4
| UN #: 1778
|EC Number: 241-034-8
|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.|
|AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!|
|Inhalation||Burning sensation. Cough. Laboured breathing. Shortness of breath. Symptoms may be delayed. See Notes.||Use ventilation, local exhaust or breathing protection.||Fresh air, rest. Half-upright position. Refer for medical attention.|
|Skin||Redness. Pain. Skin burns.||Protective gloves. Protective clothing.||Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer immediately for medical attention.|
|Eyes||Redness. Pain. Severe deep burns.||Wear face shield or eye protection in combination with breathing protection.||First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.|
|Ingestion||Burning sensation. Abdominal cramps. Vomiting. Shock or collapse.||Do not eat, drink, or smoke during work.||Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink. Refer for medical attention .|
|SPILLAGE DISPOSAL||CLASSIFICATION & LABELLING|
|Personal protection: complete protective clothing including self-contained breathing apparatus. Collect leaking and spilled liquid in sealable iron containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT let this chemical enter the environment.||
According to UN GHS Criteria
|Separated from strong bases and food and feedstuffs. Well closed.|
Put breakable packaging into closed unbreakable container.
Do not transport with food and feedstuffs.
|FLUOROSILICIC ACID||ICSC: 1233|
|PHYSICAL & CHEMICAL INFORMATION|
Physical State; Appearance
Formula: F6H2Si / H2SiF6
|EXPOSURE & HEALTH EFFECTS|
Routes of exposure
Effects of short-term exposure
Effects of long-term or repeated exposure
|OCCUPATIONAL EXPOSURE LIMITS|
|This substance may be hazardous to the environment. Special attention should be given to aquatic organisms.|
|Marketed only as aqueous solution.
Solidification point for 60-70% solution: solidifies at about 19°C, forming a crystalline dihydrate.
Other melting points: <-30°C (35% solution).
Relative density for a 61% solution is 1.46 and for 35% solution is 1.38.
Vapour pressure for a 35% solution is about 3 kPa.
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential.
Temperature of decomposition is unknown in the literature.
Immediate administration of an appropriate inhalation therapy by a doctor, or by an authorized person, should be considered.
Symbol: C; R: 34; S: (1/2)-26-27-45; Note: B
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