Description

Hexafluorosilicic Acid is a highly reactive inorganic acid, primarily known for its role as a key source of fluoride ions in industrial processes. Its commercial value lies in its effectiveness and efficiency for fluoridation and surface treatment applications. This product is essential for manufacturers in the water treatment, metal finishing, and electronics industries seeking a reliable and consistent source of soluble fluoride.

Application

• Municipal Water Fluoridation: The predominant global application, used to adjust fluoride levels in drinking water to promote dental health.
• Metal Surface Treatment: Acts as an etching and pickling agent for stainless steel, aluminum, and other metals to clean and prepare surfaces.
• Silicon & Semiconductor Manufacturing: Used in the production and cleaning of silicon wafers and in various etching processes within the electronics industry.
• Ceramic & Glass Processing: Employed as a opacifier and for improving the chemical resistance and durability of ceramic glazes and certain glass types.
• Wood Preservative: A component in formulations used to protect lumber from fungal decay and insect infestation.
• Industrial Cleaning: Used in specialized acid-based cleaning solutions for removing mineral deposits and scale.
• Fluoride Salt Production: Serves as a precursor in the synthesis of various fluoride compounds, including sodium and aluminum fluorides.

Basic Information

Product Name	Hexafluorosilicic Acid
CAS No.	16961-83-4
Molecular Formula	H2SiF6
Molecular Weight	144.09 g/mol
Synonyms	Fluorosilicic Acid; Hydrofluorosilicic Acid; Hydrosilicofluoric Acid; Dihydrogen Hexafluorosilicate; Silicofluoric Acid; HFA; H2SiF6; Hexafluorosilicic(IV) Acid
EINECS	241-034-8

Quality Control

Our Hexafluorosilicic Acid is manufactured under strict process controls to ensure batch-to-batch consistency and high purity. Quality is verified through a comprehensive suite of analytical tests, including assay, impurity profiling, and specific gravity measurement. A Certificate of Analysis (COA) detailing all specifications and test results is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and incompatible materials such as strong bases and metals. Due to its corrosive and highly volatile nature, containers must be kept upright and sealed when not in use. Recommended storage temperature is between 15°C and 25°C.

Specification

Item	Specification
Appearance	Clear, colorless liquid
Assay (as H2SiF6)	Min. 23-25% (or as specified)
Specific Gravity (20°C)	~1.22 g/mL
Fluoride Content (as F)	Contact for details
Free Hydrofluoric Acid	Max. 1.0%
Heavy Metals (as Pb)	Max. 10 ppm
Chloride (Cl)	Max. 50 ppm
Sulfate (SO4)	Max. 100 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.