CAS:7789-75-5 identifies calcium fluoride, an inorganic compound with the chemical formula CaF2 and a molecular weight of approximately 78.07 g/mol. It is commonly supplied as a white or colorless crystalline solid and is the principal chemical component of the mineral fluorite, also called fluorspar. I help industrial buyers evaluate calcium fluoride by connecting its identity, physical properties, application requirements, and procurement specifications before they place an order.
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Calcium fluoride is valued for its fluoride content, chemical stability under many operating conditions, relatively low water solubility, and optical behavior in selected wavelength ranges. Its suitable grade depends on whether the material is intended for metallurgy, hydrofluoric acid production, ceramics, glass, optical components, or another process. A reliable purchase specification should therefore define purity, particle size, moisture, impurities, packaging, and documentation rather than relying on the CAS number alone.
Calcium fluoride consists of calcium ions and fluoride ions arranged in an ionic crystal lattice. Its formula, CaF2, indicates one calcium ion associated with two fluoride ions, while the CAS number provides a standardized substance identity for purchasing, regulatory review, and technical communication. The material may be obtained from natural fluorspar or produced and processed into grades designed for specific industrial uses.
Natural fluorspar can contain mineral impurities such as silica, calcium carbonate, metal oxides, and other associated minerals. Synthetic or highly refined calcium fluoride may offer tighter control of purity and trace elements, which can be important in optical, electronic, laboratory, or high-temperature applications. I recommend treating “calcium fluoride” as a broad material description until the supplier confirms the actual grade and test limits.
Calcium fluoride is normally supplied as a solid powder, granule, crystal, or shaped optical material, depending on the application. Its approximate molecular weight is 78.07 g/mol, and its melting point is commonly reported at about 1,418 °C. These values help engineers estimate material behavior, but the exact performance of a commercial product can also depend on crystal quality, particle size, porosity, and impurity content.
Calcium fluoride has very low solubility in water under ordinary conditions, although solubility can be influenced by temperature, pH, complexing agents, and the presence of other dissolved species. It is not appropriate to assume that every calcium fluoride powder will behave identically in a process slurry or reaction mixture. For formulation work, buyers should evaluate the supplier’s test method and, when necessary, perform application-specific compatibility testing.
High-purity calcium fluoride can transmit ultraviolet, visible, and infrared radiation and is used in selected optical components. Optical performance is strongly affected by absorption, inclusions, surface quality, crystal orientation, and manufacturing method, so a general chemical purity number does not by itself guarantee optical performance. For this reason, optical buyers should request transmission data or an agreed optical specification rather than purchasing a standard industrial powder.
Calcium fluoride is generally stable in many dry, nonreactive environments, but it can react with strong acids, including hydrofluoric acid-forming systems, to release fluoride-containing species. Processing dust should not be treated as harmless simply because the material has low water solubility. I advise customers to review the current SDS, use suitable dust control, and establish handling procedures based on local occupational and environmental requirements.
Fluorspar and calcium fluoride are used in some metallurgical operations as a fluxing material. The fluoride component can help modify slag behavior and support the separation or flow characteristics required by a particular furnace process. The correct grade depends on the process chemistry, acceptable impurity limits, particle size, and whether the material is charged as lump, granule, or powder.
Calcium fluoride is an important feedstock for producing hydrofluoric acid through reaction with concentrated sulfuric acid in industrial systems. In this application, buyers usually focus on calcium fluoride content, moisture, silica, carbonate, and other impurities that can influence reaction efficiency, acid quality, residue formation, and equipment operation. The required specification should be agreed with the process engineer because a grade suitable for metallurgy may not be suitable for chemical conversion.
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High-purity calcium fluoride is used in certain optical windows, lenses, and components because of its transmission characteristics. It may also be considered in ceramic, glass, and other specialty material formulations where fluoride chemistry or thermal behavior is required. These applications often demand tighter control of trace metals, water content, particle morphology, or crystal quality than bulk industrial uses.
Natural grades are commonly selected for bulk industrial applications where the material’s principal function is fluoride supply or fluxing. Their commercial value is determined by CaF2 content, gangue minerals, moisture, particle distribution, and consistency between shipments. Natural origin does not automatically indicate either superior or inferior performance; the appropriate choice depends on the buyer’s process tolerance and quality controls.
Synthetic or refined grades are considered when the application requires tighter chemical control or lower levels of selected contaminants. These grades may be offered as fine powders, controlled particles, crystals, or fabricated optical forms. Because production routes and test methods vary, I recommend confirming whether “high purity” refers to CaF2 assay, total impurity content, or a defined list of trace-element limits.
| Specification Area | Why It Matters | What to Confirm |
|---|---|---|
| CaF2 assay | Defines the available calcium fluoride content. | Target value, test method, and permitted tolerance. |
| Impurities | May affect acid production, slag behavior, color, or optical performance. | Silica, carbonate, moisture, iron, heavy metals, and other process-specific limits. |
| Particle size | Influences feeding, reaction rate, dust generation, and dispersion. | Mesh, micron range, D-values, or a sieve-analysis requirement. |
| Physical form | Determines handling and compatibility with the customer’s equipment. | Powder, granule, lump, crystal, or optical component. |
| Documentation | Supports incoming inspection and responsible handling. | Specification sheet, SDS, certificate of analysis, lot identification, and origin information. |
I recommend beginning with the process objective instead of choosing solely by price or assay. A metallurgical buyer may prioritize bulk availability, particle size, and impurity control, while an optical buyer may prioritize crystal quality, transmission, and trace-element performance. A chemical producer may place greater emphasis on CaF2 content, moisture, and reaction-related impurities.
Next, convert the application requirements into measurable purchasing criteria. These may include a minimum CaF2 percentage, maximum moisture, defined particle-size distribution, limits for silica or iron, and packaging requirements. If the material will be used in a regulated or safety-sensitive environment, the purchasing file should also include the current SDS and any required transport or labeling information.
Calcium fluoride can be supplied in bags, lined sacks, drums, or other bulk formats, subject to product form and shipment size. Buyers should confirm minimum order quantity, production or preparation lead time, export packaging, palletization, storage conditions, and lot consistency before final approval. For repeat purchasing, a retained reference sample or agreed incoming inspection plan can help reduce variation between deliveries.
At Azeal Materials, I approach CAS:7789-75-5 as a specification-matching project rather than a one-size-fits-all commodity inquiry. We can discuss the intended application, required purity, particle size, packaging, destination, and documentation before recommending a suitable calcium fluoride supply option. This process helps distinguish bulk industrial requirements from high-purity or specialty material requirements.
For a practical quotation, please provide your target grade, estimated quantity, particle-size requirement, packaging preference, destination country, and any limits for moisture or impurities. We can then confirm available product information, commercial terms, sample or pre-shipment documentation options, and expected lead time based on the requested specification. Availability and delivery conditions should be confirmed for each order because they depend on grade, quantity, production planning, and logistics.
CAS:7789-75-5 is the identifier for calcium fluoride, CaF2, a crystalline inorganic material used in fluoride chemical production, metallurgy, optics, ceramics, glass, and other specialized applications. Its core reference data includes an approximate molecular weight of 78.07 g/mol and a melting point near 1,418 °C, while its low water solubility and optical characteristics support different industrial uses. However, the CAS number does not define purity, particle size, impurity limits, or application performance.
The next step is to create an application-specific purchasing specification and compare supplier documentation against it. Contact Azeal Materials with your intended use, quantity, required grade, and destination so we can help clarify the appropriate calcium fluoride option and the information needed for responsible procurement.
Contact us to discuss your requirements of CAS:7789-75-5. Our experienced sales team can help you identify the options that best suit your needs.