Citric acid anhydrous – Optimal pH stabilizing acidulant for sensitive formulations

1. General introduction to Citric Acid Anhydrous

Citric Acid Anhydrous is the water-free form of citric acid, a naturally occurring organic acid widely found in citrus fruits such as oranges, lemons and grapefruits. Compared to the monohydrate form, the anhydrous variant offers superior stability, more precise formulation control and reduced moisture interaction, making it particularly suitable for moisture-sensitive systems.

In pharmaceutical, cosmetic and premium food industries, Citric Acid Anhydrous functions not only as an acidulant, but also as a functional excipient and formulation regulator. Thanks to its tricarboxylic acid structure, it enables precise pH adjustment, effective buffering capacity and stabilization of active ingredients, critical factors in complex formulations such as effervescent tablets, antioxidant systems and dry products.

2. Chemical composition of Citric Acid Anhydrous

• Chemical formula:C₆H₈O₇
• Form: Anhydrous crystalline powder
• Purity:≥ 99.5%
• Structure:Tricarboxylic acid

This structure provides strong buffering capacity, efficient metal ion chelation, and enhanced stabilization of sensitive active ingredients.

3. Key advantages of Citric Acid Anhydrous

• Ultra-low moisture content: The anhydrous form minimizes moisture interaction, making it ideal for sensitive formulations such as effervescent tablets and dry powder systems.
• Precise pH control: The tricarboxylic structure allows accurate adjustment and stable maintenance of pH, ensuring API stability and efficacy.
• High formulation compatibility: Compatible with a wide range of active ingredients and excipients without compromising system stability.
• Rapid solubility: Quickly dissolves in aqueous systems, ensuring uniform distribution and optimal product performance.
• Enhanced product stability: Reduces degradation risks, extends shelf life, and maintains batch-to-batch consistency.
• Compliance with international standards: Meets USP, BP, and FCC requirements, supporting global market expansion.

4. Applications of Citric Acid Anhydrous

Citric Acid Anhydrous is widely used across multiple formulations due to its excellent pH control and stabilizing properties:

In pharmaceuticals

• Effervescent tablets: Reacts with bicarbonates to generate effervescence, enabling rapid active ingredient release and improved bioavailability
• Buffer systems: Controls and maintains optimal pH, ensuring stability of sensitive APIs
• Oral powder formulations: Adjusts acidity, enhances stability, and improves palatability
• Sensitive API formulations: Minimizes pH-induced degradation, extending product shelf life
• Antioxidant systems: Chelates metal ions, reducing oxidation and protecting active ingredients

In premium cosmetics

• Creams and moisturizers: Adjusts pH to match skin physiology and enhances stability of actives such as vitamin C and AHAs
• Serums and essences: Optimizes pH to improve active ingredient absorption and efficacy
• Chemical peels (AHA products):Provides acidification to enhance skin renewal performance
• Lotions and emulsions:Stabilizes emulsion systems, preventing phase separation and extending shelf life
• Hair care products:Balances pH, improving smoothness and reducing damage

In food and beverage applications

• Soft drinks and functional beverages: Provides natural acidity, balances flavor, and enhances consumer experience
• Dietary supplements:Adjusts pH and stabilizes vitamins and minerals
• Confectionery and processed foods:Enhances taste, controls acidity, and improves product structure

5. Commercial products using Citric Acid Anhydrous

6. Product contact information

For more information about Citric Acid Anhydrous supply, please contact us:

• Hotline: +84 (0) 834 560 500
• Email: director@biorichgroup.com
• Website: www.biorichgroup.com
• Sample / COA request: Please contact us via email to receive product samples and the latest Certificate of Analysis (COA)