- Sodium silicofluoride
- Sodium hexafluorosilicate
- Sodium fluosilicate
- Disodium hexafluorosilicate
Fine, white, odorless, powdered solid.
In enamels for china & porcelain, manufacture opal glass, insect exterminator & poison for rodents, mothproofing of woolens, vet: pediculicide.
Registry Numbers and Inventories.
EC Index Number
Agricultural Chemical and Pesticide; Tumorigen; Primary Irritant
Swiss Giftliste 1
Japan ENCS (MITI)
2.68 g/cm3 (20 C)
Solubility in water
Heat of fusion
Hazards and Protection.
Keep tightly closed in a cool place in a tightly closed container.
Containers of this material may be hazardous when emptied. Since emptied containers retain product residues (vapor, liquid, and/or solid), all hazard precautions given in the data sheet must be observed.
Wear skin protection and self-contained breathing apparatus.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers.
Unstable, can react explosively with impurities highly reactive.
Acids, alkalies, excessive heat, silicon tetrafluoride.
When heated to decomposition it emits toxic fumes of hydrogen fluoride and na2o.
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide. Keep run-off water out of sewers and water sources.
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Decomposes at red heat
Fire may produce irritating, corrosive and/or toxic gases.
TLV: ppm; 2.5 mg/m3 as F (as TWA) (ACGIH 1994-1995).
Hyperactive reflexes, painful muscle spasms, weakness and tetanic contractures may be noted due to fluoride induced hypocalcemia. Prenatal fluoride supplementation (2.2 mg NaF or 1 mg fluoride daily) during the last two trimesters of pregnancy has been reported to be safe.
Epigastric pain, nausea, dysphagia, salivation, hematemesis, and diarrhea may be noted. These effects may be delayed for several hours following exposure. Gi symptoms are noted when 3 to 5 mg/kg of fluoride are ingested.
Respirations are first stimulated then depressed. Death is usually from respiratory paralysis. Following inhalation, coughing and choking may be noted.
Urticaria and pruritus have been reported following exposure to fluoride.
Seek medical attention; administer gastric lavage with lime water, then give lime water or milk at frequent intervals.
Move to fresh air.
Flush with water; wash with soap and water.
Flush with water for at least 15 min.
USCG CHRIS Code
Std. Transport #