Copper Citrate CAS 866-82-0 Bulk Supplier | Bioavailable Copper Complex

Copper Citrate (CAS 866-82-0) is an organic copper salt formed by complexing copper ions with citric acid, resulting in a highly functional and formulation-friendly trace mineral ingredient. Supplied as a characteristic blue powder with 98–104% assay on a dried basis and a defined copper content of 36%, it is widely used in nutraceutical, dietary supplement, and functional premix applications where controlled copper delivery is required.

Product Description

Copper Citrate is valued for its balanced combination of chemical stability, mineral content accuracy, and compatibility with modern supplement formulations. Unlike inorganic copper salts, citrate-based copper complexes are often selected for their uniform composition and ease of incorporation into multicomponent mineral systems. The material is supplied as a free-flowing blue powder with consistent particle characteristics, supporting efficient blending and homogeneous distribution in solid dosage forms.

Each batch is analytically verified by titration to confirm both total assay (98–104% on dried basis) and copper content (36%), ensuring predictable formulation behavior and batch-to-batch reproducibility. This level of analytical control is essential for manufacturers producing standardized mineral blends or regulated nutritional products.

Technical Properties

• CAS Number: 866-82-0
• Catalog Number: NST-12-4
• Molecular Formula: C₆H₈Cu₂O₇
• Molecular Weight: 319.22 g/mol
• Appearance: Blue powder
• Assay: 98–104% (on dried basis, by titration)
• Copper Content (Cu): 36%

Applications & Industries

Copper Citrate bulk powder is used in applications where accurate copper dosing, formulation stability, and consistent mineral distribution are critical.

• Nutraceuticals & Dietary Supplements: Commonly incorporated into trace mineral complexes, multivitamin formulations, and specialty micronutrient blends. Its defined copper content allows precise formulation design without over- or under-dosing.
• Functional Food & Premix Systems: Suitable for fortified powders, nutritional premixes, and customized ingredient systems where mineral uniformity and compatibility are required.
• Pharmaceutical & Formulation Research: Used in R&D settings for evaluating copper delivery systems, mineral interactions, and formulation optimization.
• Contract Manufacturing & Private Label: Ideal for manufacturers producing capsules, tablets, and powder blends that demand reliable raw material specifications and repeatable processing behavior.

Key Advantages

Precisely defined copper concentration: A copper content of 36% enables accurate formulation calculations and consistent micronutrient delivery.

Organic citrate complex: The citrate matrix supports compatibility with other vitamins and minerals in complex formulations, reducing formulation challenges.

Stable, formulation-ready powder: The blue powder form allows easy handling, blending, and incorporation into solid dosage forms without additional processing steps.

Reliable analytical control: Assay verification on a dried basis ensures batch consistency, an essential requirement for regulated nutraceutical and food-grade applications.

B2B-ready documentation: Supplied with COA and supporting technical data to facilitate quality control, regulatory review, and customer audits.

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