Description

Cryptohalite ((NH4)2SiF6) is the ammonium salt of hexafluorosilicic acid, a well-defined inorganic compound with the CAS registry number 1309-32-6. This material is valued for its role as a source of fluoride and silicon in controlled industrial processes. It is primarily utilized in sectors such as glass etching, metal surface treatment, and specialized chemical synthesis, where precise reagent quality is critical.

Application

• Glass Etching and Frosting: A key component in formulations for creating matte or frosted finishes on glass surfaces.
• Metal Treatment: Used in surface preparation and cleaning baths for metals like aluminum and magnesium alloys.
• Chemical Synthesis: Serves as a fluoride source or intermediate in the production of other silicon and fluorine-containing compounds.
• Wood Preservative Formulations: Acts as an active ingredient in certain preservative treatments due to its biocidal properties.
• Ceramics and Enamel Manufacturing: Employed as a flux or opacifier in specific ceramic and enamel frits.
• Laboratory Reagent: Used in analytical chemistry and research as a standardized reagent.

Basic Information

Product Name	Cryptohalite
CAS No.	1309-32-6
Molecular Formula	(NH4)2SiF6
Molecular Weight	178.15 g/mol
Synonyms	Ammonium hexafluorosilicate; Ammonium fluosilicate; Ammonium silicon fluoride; Diammonium hexafluorosilicate; (NH4)2SiF6; Silicon hexafluoride diammonium salt; Bararite; Cryptohalite (mineral name)
EINECS	215-167-3

Quality Control

Our Cryptohalite is manufactured under controlled conditions to ensure batch-to-batch consistency and high purity. Quality is verified through a series of analytical tests including assay, impurity profiling, and physical characterization. Certificates of Analysis (COA) documenting these results are 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, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent caking and degradation.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (as (NH4)2SiF6)	≥ 98.0 %
Loss on Drying	≤ 1.0 %
Water Insoluble Matter	≤ 0.5 %
Chloride (Cl)	≤ 0.01 %
Sulfate (SO4)	≤ 0.02 %
Heavy Metals (as Pb)	≤ 10 ppm

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