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Anhydrous Citric Acid (CAS No.: 5949-29-1) is a premium moisture-free variant of citric acid, specifically engineered for low-moisture processing environments where quality and consistency are paramount. It is securely supplied in 25kg kraft paper bags with PE liners. The internal PE liner provides a critical airtight, moisture-proof barrier to prevent caking, while the robust kraft paper outer layer ensures durability and protection during transportation. Key technical specifications include a purity of ≥99.5%, a moisture content of < 1.0% (which is critical for dry mixes), sulphated ash at ≤ 0.05% (minimizing impurities), and a pH level of 2.2–2.5 (tested in a 1% aqueous solution). These precise attributes make it an ideal choice for manufacturing applications where even trace amounts of moisture could compromise product stability and quality.
This product strongly resists moisture absorption, even in highly humid production environments (such as tropical factories operating with a relative humidity > 70%). By avoiding caking, it ensures consistent, uninterrupted flowability in automated production lines, significantly reducing maintenance downtime and equipment blockages.
It maintains its structural and chemical properties at temperatures up to 175°C, with decomposition only starting above this threshold. This high heat tolerance makes it perfectly suitable for demanding processing methods like baking, extrusion, and spray drying without losing its functional efficacy.
Anhydrous citric acid delivers equivalent sourness to tartaric acid at a 15% lower dosage. For example, just 0.5g of anhydrous citric acid achieves the exact same sourness profile as 0.59g of tartaric acid, directly reducing raw material costs for large-scale food and beverage manufacturers.
It is available in a customizable particle size range of 30–100 mesh. Common specifications include 40–60 mesh for instant mixes and 80–100 mesh for powdered beverages. This tailored sizing ensures uniform dissolution and prevents ingredient segregation in complex dry formulations.
The manufacturing process ensures it contains no residual solvents or fermentation by-products. Heavy metal levels, including lead, mercury, and cadmium, are strictly controlled to ≤ 0.1 ppm, fully meeting rigorous pharmaceutical-grade safety standards for sensitive applications.
Widely incorporated into instant drink mixes (such as powdered coffee and chocolate drinks), cake mixes, and seasoning blends at a standard dosage of 0.2%–0.8%. In instant soup mixes, it acts as a flavor enhancer, boosting umami notes while perfectly balancing the saltiness of the broth bases.
It is a vital additive in sugar-free chewing gum formulations, typically used at a dosage of 0.3%–0.5%. It helps prevent microbial growth, such as mold, extending the product's shelf life without negatively affecting the gum’s elasticity or chewiness over prolonged storage periods.
Used effectively in the meat processing industry, it is sprayed as a dilute solution (5% concentration) onto fresh poultry, including chicken and turkey. This application lowers the surface pH, extending cold storage life by 5–7 days and significantly reducing the risk of Salmonella contamination during transit.
Serves as a crucial excipient in effervescent tablets, such as vitamin C supplements. It is designed to react rapidly with sodium bicarbonate upon contact with water, producing carbon dioxide to improve both the tablet's dissolution rate and overall palatability for the patient.
Q: What’s the key difference between anhydrous citric acid and monohydrate citric acid?
A: Anhydrous citric acid contains absolutely no crystalline water (H₂O), while the monohydrate version contains one molecule of crystalline water per molecule of citric acid. This structural difference makes the anhydrous form highly preferable for dry mixes (e.g., cake powders, instant drinks) as it actively avoids clumping. The monohydrate is better suited for liquid-based products (e.g., juices, sauces) where additional moisture introduction is not a concern.
Q: Can it be used in pharmaceutical formulations beyond effervescent tablets?
A: Yes, its exceptionally low bacterial endotoxin content (< 0.5 IU/mg) qualifies it for safe use in oral suspensions, syrups, and even injectable formulations as a reliable pH adjuster. It fully complies with stringent USP-NF pharmaceutical standards.
Q: Is the 25kg packaging recyclable or reusable?
A: The kraft paper outer bag is fully recyclable and strictly meets EN 13432 compostability standards. Additionally, the inner PE liner can be cleaned and safely reused for storing dry, non-food items such as hardware or craft supplies. Bulk packaging options, like 500kg super sacks, are also available for large-scale manufacturers to minimize packaging waste.
Review the essential packaging, shelf life, and logistical specifications below to support proper handling and inventory planning for bulk requirements.
| Attribute | Detail |
|---|---|
| Name | Citric Acid Monohydrate /Anhydrous |
| Ingredient | Citric Acid |
| Specification | 25kg |
| Capacity | 25 kg |
| Place Of Production | Guangzhou, China |
| Shelf Life | 2 years |
| Storage Conditions | Store in a cool, dry place |
Strict adherence to the recommended storage conditions ensures the material maintains its optimal stability throughout the 2-year shelf life, preventing unwanted moisture absorption during warehousing.
