Identification and Related Records
- 【CAS Registry number】
Silicate(2-),hexafluoro-, disodium (8CI,9CI)
Silicate(2-),hexafluoro-, sodium (1:2)
Sodium fluosilicate (Na2(SiF6))
Sodium hexafluorosilicate (Na2SiF6)
- 【Molecular Formula】
- F6Na2Si (Products with the same molecular formula)
Chemical and Physical Properties
- SOL IN 150 PARTS COLD, 40 PARTS BOILING WATER; INSOL IN ALCOHOL
Insoluble in ethanol.
In water, 0.64 g/100 g at 20 deg C, 0.76 g/100 g at 25 deg C, 1.27 g/100 g at 50 deg C, 2.45 g/100 g at 100 deg C.
- WHITE GRANULAR POWDER
White, hexagonal crystals.
White, crystalline powder.
White, free-flowing powder.
- 【Computed Properties】
- Molecular Weight:188.055459 [g/mol]
Rotatable Bond Count:0
Topological Polar Surface Area:0
Heavy Atom Count:9
Isotope Atom Count:0
Defined Atom Stereocenter Count:0
Undefined Atom Stereocenter Count:0
Defined Bond Stereocenter Count:0
Undefined Bond Stereocenter Count:0
Covalently-Bonded Unit Count:3
Safety and Handling
Safety Information of?Sodium fluorosilicate (CAS NO.16893-85-9):
Hazard Codes:T ,Xi?
23/24/25:Toxic by inhalation, in contact with skin and if swallowed??
26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice?
45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)?
RIDADR:UN 2674 6.1/PG 3
Poison by ingestion and subcutaneous routes. A skin and severe eye irritant. An insecticide. When heated to decomposition it emits very toxic fumes of F? and Na2O.
- Granular bait
Grades: Technical; C.P.
The average grade of commerce is approx. 98% pure.
- 【DOT Emergency Guidelines】
- /GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Health: TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Fire or Explosion: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Public Safety: CALL Emergency Response Telephone Number ... . As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. Keep unauthorized personnel away. Stay upwind. Keep out of low areas. Ventilate enclosed areas.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Evacuation: ... Fire: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Fire: Small fires: Dry chemical, CO2 or water spray. Large fires: Dry chemical, CO2, alcohol-resistant foam or water spray. Move containers from fire area if you can do it without risk. Dike fire control water for later disposal; do not scatter the material. Fire involving tanks or car/trailer loads: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Do not get water inside containers. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Spill or Leak: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ First Aid: Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin. Keep victim warm and quiet. Effects of exposure (inhalation, ingestion or skin contact) to substance may be delayed. Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves.
- 【Disposal Methods】
- SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.
Use and Manufacturing
- 【Use and Manufacturing】
- Methods of Manufacturing
THIS SALT IS MADE BY NEUTRALIZING FLUOSILICIC ACID WITH SODIUM HYDROXIDE OR SODIUM CARBONATE.
From fluorosilicic acid and sodium carbonate or sodium chloride.
Sodium chloride, natural + hexafluorosilicic acid (salt formation).
The manufacture of fluosilicates, especially the sodium salt, is carried out by neutralization of fluosilicic acid. The operation is carried out under vigorous agitation, with control of the ratio of reagents in order not to simultaneously produce the fluoride by introduction of excess alkali. Sodium fluosilicate is prepared by the action of fluosilicic acid on the sodium chloride. The products are filterable solids.U.S. Imports
(1984) 3.00X10+9 gU.S. Production
(1984) 1.96X10+10 g