CAS 7789-75-5 Calcium Fluoride: Uses, Grades, and Specifications

Calcium fluoride (CaF₂), CAS 7789-75-5, is an inorganic compound used in metallurgy, glass and ceramics, and optical applications. The right grade depends on how the material will be used: buyers should match purity and impurity limits, particle size, physical form, and documentation to the process rather than select by product name alone. Calcium fluoride has a molar mass of 78.07 g/mol, a melting point of approximately 1,418 °C, and a density of about 3.18 g/cm³. These reference properties help identify the compound, but they do not replace a specification for a particular application.

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Who This Guide Is For

This guide is intended for procurement teams, formulators, engineers, and distributors evaluating calcium fluoride for industrial or technical use. It explains common material options, how to compare specifications, and what to confirm with a supplier before placing an order. Because grade names and limits can vary between suppliers, we recommend reviewing the actual specification and batch documentation for the offered product. Buyers should also check that the material is suitable for their process and applicable handling requirements.

Calcium Fluoride: Basic Context

Calcium fluoride is a white, crystalline solid that occurs naturally as the mineral fluorite and can also be produced synthetically. Its chemical formula is CaF₂, and its composition is based on calcium and fluoride ions. Material properties relevant to purchasing include chemical purity, trace impurities, moisture, particle-size distribution, and consistency between batches. The importance of each property depends on the end use.

How Calcium Fluoride Functions in Industry

In metallurgical processes, calcium fluoride may be used as a flux or flux component to influence melt behavior and support the removal of impurities. In glass and ceramic formulations, it can serve as a source of fluoride and contribute to formulation-specific processing or product properties. Optical applications use calcium fluoride in components where its transmission characteristics are useful across selected spectral ranges. These uses have different requirements, so a product suited to one application should not be assumed suitable for another.

Types, Materials, and Grade Considerations

Natural Fluorspar-Based Material

Natural calcium fluoride is obtained from fluorite ore and processed into commercial material. Its suitability depends on the ore source and processing, which can affect purity, particle size, and the levels of associated minerals or other impurities. Natural material may be considered for bulk industrial applications when its verified analysis fits the process requirements. Buyers should request the current specification rather than rely only on a general grade description.

Synthetic Calcium Fluoride

Synthetic calcium fluoride is produced through chemical processing and may be offered for applications that require defined compositional or physical characteristics. Its exact properties depend on the production route and subsequent processing. For optical or other technical applications, buyers should request application-relevant data and confirm whether the offered material is supplied as powder, granules, or a shaped component. The term “synthetic” by itself does not establish a particular purity or performance level.

Industrial, High-Purity, and Optical Options

Suppliers may describe products as industrial grade, high purity, or optical grade, but these labels are not a substitute for agreed limits. Industrial buyers often focus on chemistry, particle size, and process compatibility, while high-purity applications may require tighter control of trace elements and moisture. Optical applications may need information about transmission, inclusions, homogeneity, or component dimensions, depending on the product form. Confirm the relevant test methods and acceptance criteria before comparing quotations.

Matching Calcium Fluoride to Its Application

This table is a starting point, not a substitute for process trials or technical review. For optical products, powder specifications alone may not demonstrate the performance of a finished window or lens. For metallurgical use, the required chemistry can depend on the furnace, charge, and flux formulation. Share the intended use and acceptance criteria with the supplier before selecting a grade.

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How to Select a Specification

1. Define the End Use and Acceptance Limits

Start with the application, required product form, expected consumption, and any limits set by your process or customer. Identify which impurities matter and specify maximum levels where necessary. If a property is not critical, avoid adding an unnecessary tight limit that could restrict sourcing or increase cost. Where the product will be incorporated into a formulation, consult the process owner or technical team before finalizing requirements.

2. Review Chemistry and Physical Properties

Ask for a specification that lists the CaF₂ content and the impurities relevant to your application. Depending on the product, useful physical details may include particle-size range, bulk density, moisture, and appearance. Confirm whether values are guaranteed limits, typical values, or batch results; these terms are not interchangeable. A certificate of analysis should correspond to the supplied batch when batch-level verification is needed.

3. Confirm Sampling, Testing, and Packaging

Clarify the analytical methods or agreed procedures used to verify the specification, especially when small differences affect production. Confirm packaging type, unit size, labeling, storage conditions, and any precautions required for transport or use. If your process requires a particular particle distribution or packaging format, state it in the inquiry and purchase documents. This reduces the risk of receiving a chemically suitable product in an unsuitable physical form.

Pricing, MOQ, and Lead Time

Calcium fluoride pricing can depend on grade, purity, particle size, order quantity, packaging, origin, and logistics. A higher-purity or specially processed product may involve different production and quality-control requirements than a bulk industrial grade, but the actual price must be confirmed for the requested specification. Minimum order quantities and lead times can also vary with stock status, production schedule, and destination. Request a quotation that states the product specification, quantity, packaging, delivery terms, and quotation validity so offers can be compared on the same basis.

For a first order or a new application, buyers may consider discussing a representative sample or trial quantity, subject to availability and supplier terms. A sample should be evaluated against the same acceptance criteria intended for routine purchasing. If a process depends on continuity, ask how repeat orders will be managed and whether any proposed specification changes require approval. These steps help make sourcing decisions more predictable without assuming that every supplier offers identical options.

Supplier Evaluation Checklist

• Does the supplier provide a clear, application-relevant specification?
• Can the supplier provide batch documentation, such as a certificate of analysis, when required?
• Are test methods, sampling approach, and specification tolerances clear?
• Can the supplier confirm product form, particle size, packaging, and available quantities?
• Are lead time, delivery terms, and handling requirements stated in the quotation?
• Is there a clear process for addressing out-of-specification material or specification changes?

In our view, a reliable supplier discussion should begin with the buyer’s application and acceptance limits, not only a request for a generic “calcium fluoride” quote. Azeal Materials can discuss calcium fluoride sourcing requirements, product specifications, documentation needs, and order details with B2B buyers. Availability, grade options, and service arrangements should be confirmed for each inquiry. Providing your target specification and destination helps us assess the request more efficiently.

Key Takeaways and Next Steps

Calcium fluoride, CAS 7789-75-5, is used across several industries, but its suitable grade depends on the application and the verified properties of the offered material. Natural and synthetic options, as well as industrial and specialty descriptions, should be assessed through actual chemical and physical specifications rather than labels alone. The most useful purchasing checks are relevant impurity limits, particle size, product form, batch documentation, packaging, and delivery terms. Reference properties such as 78.07 g/mol molar mass, approximately 1,418 °C melting point, and about 3.18 g/cm³ density help identify the compound but do not define a commercial grade.

To move forward, prepare your intended application, required purity or impurity limits, particle-size or form requirements, estimated quantity, packaging preference, and destination. Share these details with Azeal Materials to request a product and quotation review. Confirm the final specification and documentation before purchase, and evaluate a trial quantity when process compatibility is uncertain.

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