Hexafluorosilicic acid Properties
- Boiling point:
- 1.22 g/mL at 25 °C
- refractive index
- Flash point:
- storage temp.
- H2O: 1 mg/mL, clear, colorless
- Specific Gravity
- 1.38 (40%)
- Clear colorless
- Water Solubility
- Miscible with water.
- Hydrolytic Sensitivity
- 0: forms stable aqueous solutions
- Stable in aqueous solution.
- CAS DataBase Reference
- 16961-83-4(CAS DataBase Reference)
- EWG's Food Scores
- EPA Substance Registry System
- Fluosilicic acid (16961-83-4)
- Risk and Safety Statements
|RIDADR||UN 1778 8/PG 2
|Toxicity||LD50 oral in rat: 430mg/kg|
Hexafluorosilicic acid price More Price(6)
|Manufacturer||Product number||Product description||CAS number||Packaging||Price||Updated||Buy|
|Sigma-Aldrich||372757||Fluorosilicic acid solution 20-25 wt. % in H2O||16961-83-4||500g||$53.1||2019-12-02||Buy|
|Sigma-Aldrich||01302||Fluosilicic acid purum, 33.5-35%||16961-83-4||1l||$58.9||2019-12-02||Buy|
|Alfa Aesar||069109||Hexafluorosilicic acid, 23% w/w aq. soln.||16961-83-4||500g||$47.5||2019-12-02||Buy|
|Alfa Aesar||L14829||Hexafluorosilicic acid, 35% w/w aq. soln.||16961-83-4||500g||$47.5||2019-12-02||Buy|
|Sigma-Aldrich||01302||Fluosilicic acid purum, 33.5-35%||16961-83-4||6x1l||$293||2019-12-02||Buy|
Hexafluorosilicic acid Chemical Properties,Uses,Production
DescriptionHexafluorosilicic acid is a kind of inorganic acid. It is majorly used for the fluoridation of water in United State to minimize the incidence of dental caries and dental fluorosis. For chemical synthesis, it is majorly used for the manufacturing of aluminum fluoride and cryolite as well as many kinds of hexafluorosilicate salts. It can also be used for the production of silicon and silicon dioxide. It can also be used as an electrolyte in the Betts electrolytic process for refining lead. It is also a specialized reagent in organic synthesis for cleaving Si–O bonds of silyl ethers.
Chemical PropertiesFluosilicic acid,H2SiF6, also known as hydrofluorosilicic acid,is a colorless liquid that is soluble in water. It is highly corrosive and toxic,attacking glass and stoneware. Fluosilicic acid is used in water fluoridation, electroplating, and in manufacturing enamels and cement.
Chemical PropertiesFluorosilicic acid is a transparent, colorless fuming liquid.
UsesA 1-2% solution is used widely for sterilizing equipment in brewing and bottling establishments. Other concentrations are used in the electrolytic refining of lead, in electroplating, for hardening cement, crumbling lime or brick work, for the removal of lime from hides during the tanning process, to remove molds, as preservative for timber.
General DescriptionA colorless fuming liquid with a penetrating pungent odor. Corrosive to metals and tissue. Both the fumes and very short contact with the liquid can cause severe and painful burns. Used in water fluoridation, in hardening cement and ceramics, as a wood preservative.
Air & Water ReactionsFumes in air. Soluble in water with release of heat and corrosive fumes.
Reactivity ProfileHexafluorosilicic acid can react with strong acids (such as sulfuric acid) to release fumes of toxic hydrogen fluoride. Attacks glass and materials containing silica. Reacts exothermically with chemical bases (examples: amines, amides, inorganic hydroxides). Reacts with active metals, including iron and aluminum to dissolve the metal and liberate hydrogen and/or toxic gases. Can initiate polymerization in certain alkenes. Reacts with cyanide salts and compounds to release gaseous hydrogen cyanide. Flammable and/or toxic gases are also often generated by reactions with dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides, and weak or strong reducing agents. Additional gas-generating reactions may occur with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), and carbonates. Can catalyze (increase the rate of) chemical reactions. Decomposes when heated to the boiling point to produce very toxic and corrosive hydrogen fluoride gas.
HazardExtremely corrosive by skin contact and inhalation.
Health HazardInhalation of vapor produces severe corrosive effect on mucous membrane. Ingestion causes severe burns of mouth and stomach. Contact with liquid or vapor causes severe burns of eyes and skin.
Fire HazardSpecial Hazards of Combustion Products: Irritating fumes of hydrogen fluoride may form in fire.
Industrial usesHydrofluorosilicic acid (H2SiF6) is a colorless to light brown liquid. It is also manufactured from calcium fluoride or other fluoride-containing products. Hydrofluorosilic acid is a strong depressant for many silicates during flotation of a number of oxidic minerals. It is used for gangue depression during flotation of tin, columbite and tantalite.
Safety ProfilePoison by subcutaneous route. A corrosive irritant to sktn, eyes, and mucous membranes. Will react with water or steam to produce toxic and corrosive fumes. When heated to decomposition it emits toxic fumes of F-. See also FLUORIDES.
Potential ExposureA solution of fluorosilicic acid is used for sterilization in the brewing and bottling industry, elec trolytic refining of lead; electroplating, hardening cement; removing mold, and others.
ShippingUN1778 Fluorosilicic acid, Hazard class: 8; Labels: 8-Corrosive material.
IncompatibilitiesThe aqueous solution is a strong acid. Reacts with water or steam to produce toxic and corrosive fumes of hydrogen fluoride. Incompatible, and may react violently with: bases, aliphatic amines; alkanolamines, alkylene oxides; aromatic amines; amides, ammonia, ammonium hydroxide; calcium oxide; epichlorohydrin, iso cyanates, oleum, organic anhydrides; sulfuric acid; strong oxidizers; vinyl acetate; water. Attacks glass, concrete, and ceramics. The anhydrous form dissociates almost instantly into silicon tetrafluoride and hydrogen fluoride.
Waste DisposalAdd slowly to a large amount of soda ash in solution. Discharge to sewer with large volumes of water
ReferencesRobinson, Tim. "Innovative Processes in Electrometallurgy." Innovative Process Development in Metallurgical Industry. Springer International Publishing, 2016. 385- 392.
Sarawade, Pradip B., et al. "Recovery of high surface area mesoporous silica from waste hexafluorosilicic acid (H 2 SiF 6) of fertilizer industry." Journal of hazardous materials 173.1 (2010): 576-580.
Kauffman, Joel M. "Water fluoridation: a review of recent research and actions." Journal of American Physicians and Surgeons 10.2 (2005): 38.
Krot, V. V., et al. "ChemInform Abstract: Preparation of Amorphous Silicon Dioxide from Hexafluorosilicic Acid." Cheminform 23.48(1992):no-no.
Zorya, L., and V. Krot. "Method of high-purity silica production from hexafluorosilicic acid." Reaction Kinetics & Catalysis Letters 50.1-2(1993):349-354.
Hexafluorosilicic acid Preparation Products And Raw materials
View Lastest Price from Hexafluorosilicic acid manufacturers
|Image||Release date||Product||Price||Min. Order||Purity||Supply Ability||Manufacturer|
|US $1.00 / kg||1kg||95%-99%||100kg||career henan chemical co|
16961-83-4(Hexafluorosilicic acid)Related Search:
- FLUOROSILIC ACID
- FLUOROSILICIC ACID
- CORTICOTROPIN A
- Hexafluorosilicic acid, 35% w/w aq. soln.
- Hexafluorosilicic acid, 23% w/w aq. soln.
- Silicofluoric acid: (Fluorosilicic acid)
- FLUOROSILICIC ACID, 25% in water
- Fluorosilicic acid, Hexafluorosilicic acid, Hydrogen hexafluorosilicate
- Hexafluorosilic acid
- Fluosilicic acid, 25 WT % aqueous solution
- Hydrosillicofluoric acid
- Hexafluorosilicic Acid w/w aq. Soln.
- Fluorosilicic acid 35%
- Fluorosilicic acid s
- Hexafluorosilicic acid (HFS)
- Fluosilicic acid, 25 wt % aqueous solution 500GR
- FLUOROSILICIC ACID, 22-25% in water
- Fluorosilicic acid, 25 wt.% solution in H2O
- Fluosilicic acid purum, 33.5-35%
- Hexafluorosilicic acid solution, 23 wt. % in water
- SILICOFLUORIC ACID
- SER-TYR-SER-MET-GLU-HIS-PHE-ARG-TRP-GLY-LYS-PRO-VAL-GLY-LYS-LYS-ARG-ARG-PRO-VAL-LYS-VAL-TYR-PRO-ASN-GLY-ALA-GLU-ASP-GLU-SER-ALA-GLU-ALA-PHE-PRO-LEU-GLU-PHE HUMAN
- HYDROGEN HEXAFLUOROSILICATE
- HYDROFLUOROSILICIC ACID
- HYDROFLUOSILICIC ACID
- HYDROSILICOFLUORIC ACID
- HEXAFLUOROSILICIC ACID
- HEXAFLUOSILICIC ACID
- FLUOSILICIC ACID
- Fluorosilicic acid 35% Fluorosilicic acid Hexafluorosilicic acid Fluosilicic acid
- CORTICOTROPIN (HUMAN)
- DIHYDROGEN HEXAFLUOROSILICATE
- ACTH 1-39
- ACTH (1-39), HUMAN
- ADRENOCORTICOTROPIC HORMONE (1-39) (HUMAN)
- ADRENOCORTICOTROPIC HORMONE HUMAN
- Sand acid
- FLUOROSILICIC ACID, 20-25 WT. % SOLUTION IN WATER
- Hexafluorosilicic acid 25 %
- HEXAFLUOROSILICIC ACID 34 %, PURE
- HEXAFLUOROSILICIC ACID 34 %, TECHNICAL
- HEXAFLUOROSILICIC ACID APPROX. 25 %
- Hexafluorosilicic acid, 35% aqueous solution
- Fluorsilicic acid
- FLUOROSILICIC ACID, 20-25% SOLUTION
- Silicate(2-), hexafluoro-, dihydrogen
- fluorosilicic acid solution
- Hexafluorosilicic acid, 23% aqueous solution
- FLUOROSILICIC ACID: 35% IN WATER
- HEXAFLUOROSILICIC ACID: 35% W/W AQUEOUS SOLUTION