Anhydrous citric acid, with the formula C6H8O7, is a key organic compound without water molecules. It's made by fermenting sugars with Aspergillus niger and then purifying and dehydrating. It's a white, odorless crystalline powder, highly soluble in water and other polar solvents, and has a sour taste. As a weak acid, it can lower pH and react with bases to form salts. It's used widely in the food and beverage industry for flavor and preservation, in pharmaceuticals for effervescent tablets, and in cosmetics for pH adjustment and exfoliation.
1. Food & Beverage
Used as an acidulant for sour flavor in drinks, candies, and jams. Acts as a preservative by inhibiting microbes in acidic conditions and regulates pH in food products.
2. Pharmaceuticals
Key in effervescent tablets (reacts with sodium bicarbonate to release CO2 for fast dissolution). Also balances pH and stabilizes drug formulas.
3. Cosmetics
Adjusts pH in skincare (toners, creams, shampoos) and gently exfoliates dead skin. Enhances ingredient effectiveness as a chelating agent.
4. Industrial Chemistry
Works as a chelating agent to bind metal ions in water treatment, detergents, and cleaning products. Also used in fertilizers and as a corrosion inhibitor.
5. Agriculture & Animal Feed
Added to feed as an acidifier to improve taste and digestion. Lowers gut pH to reduce harmful bacteria and boost nutrient absorption in livestock.
1. High Stability & Purity
No water molecules in its structure mean it resists moisture, clumping, and degradation, ensuring consistent quality in storage and use.
2. Rapid Solubility
Easily dissolves in water and polar solvents, ideal for quick integration into beverages, pharmaceuticals, and cosmetics.
3. Effective pH Control
Acts as a weak acid to adjust and buffer pH, inhibiting microbes in food, stabilizing drugs, and balancing skincare formulas.
4. Multi-functional Use
Serves as an acidulant, chelating agent, preservative, and exfoliant across industries, reducing the need for multiple additives.
5. Safety & Compliance
Approved by global regulators (FDA, EFSA), naturally occurring, and biodegradable, meeting clean label and sustainability standards.
| Test Items |
Specification |
Results |
| Characters |
Colourless Translucent Crystals Or As White, Fine, Crystalline Powder |
Colourless Translucent Crystals Or As White, Fine, Crystalline Powder |
| Identification |
Pass Test |
Passes Test |
| Clarity And Colour Of Solution |
Pass Test |
Passes Test |
| Content |
99.5-100.5% |
100.10% |
| Moisture |
≤0.5% |
0.10% |
| Oxalic Acid |
≤100mg/Kg |
<100mg/Kg |
| Sulphate |
≤150ppm |
<150ppm |
| Readily Carbonisable Substances |
Abs ≤0.52 |
<0.52 |
| Tra ≥30% |
>30% |
| Residue On Ignition(Sulphated Ash) |
≤0.05% |
0.01% |
| Heavy Metals |
≤10ppm |
<5ppm |
| Arsenic |
≤1mg/Kg |
<0.1mg/Kg |
| Lead |
≤0.5mg/Kg |
<0.1mg/Kg |
| Mercury |
≤1mg/Kg |
<0.1mg/Kg |
| Aluminium |
≤0.2ppm |
<0.2ppm |
| Bacterial Endotoxins |
≤0.5Iu/Mg |
<0.5Iu/Mg |
| Isociric Acid (Relative Substances) |
Pass Test |
Pass Test |
| Polycyclic Aromatic Hydrocarbon |
Pass Test |
Pass Test |
| Trilaurylamine |
≤0.1mg/Kg |
<0.1mg/Kg |
| Sterility |
Pass Test |
Pass Test |
| Barium |
Pass Test |
Pass Test |
| Calcium |
≤200ppm |
<200ppm |
| Iron |
≤50ppm |
<50ppm |
| Chloride |
≤50ppm |
<50ppm |
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