Introduction
Anhydrous citric acid is the water‑free form of citric acid, a naturally occurring organic acid found in citrus fruits. It is widely used as an acidulant, preservative, pH adjuster, chelating agent, and effervescent component in food, pharmaceutical, cosmetics, and industrial cleaning applications.
SNOWWHITE CHEMICAL CO., LTD is a professional chemical supplier based in Nanjing, China. Our core product portfolio includes toluene oxidation derivatives (benzoic acid, sodium benzoate, etc.), toluene/ethylbenzene chlorination derivatives, fumaric acid, maleic anhydride, and other fine chemicals. Building on our expertise in global chemical supply, we now offer anhydrous citric acid (CAS 77-92-9) in three grades—Food Grade (E330/FCC/USP), Pharmaceutical Grade (USP/BP/EP/JP), and Industrial/Technical Grade—with ISO‑certified quality, competitive pricing, and global shipping.
What Is Anhydrous Citric Acid?
Anhydrous citric acid is the water‑free form of citric acid. "Anhydrous" means no water of crystallization is present in the crystal structure. The product appears as a white or colorless crystalline powder (or granules), odorless, with a strongly acidic taste, and is highly soluble in water.
Anhydrous vs. Monohydrate:
Anhydrous: moisture ≤0.5% → higher acidity per gram, faster dissolution. Preferred for dry powder blends, effervescent tablets, and moisture‑sensitive formulations.
Monohydrate: contains approximately 7.5‑9.0% water → lower acidity per gram, slightly slower dissolution. Commonly used in liquid beverages and wet processing.
Product Grades & Key Specifications
Food Grade
Approved as an acidity regulator, preservative, and flavor enhancer. Used in soft drinks, juices, jams, candies, dairy products, sauces, canned foods, dry beverage mixes, wine, beer, baked goods, and meat processing.
Pharmaceutical Grade
Meets pharmacopoeia standards (USP, BP, Ph. Eur., JP). Used as an excipient, pH modifier, buffer, and effervescent component in effervescent tablets, oral rehydration salts, syrups, chewable tablets, buffer solutions, antacids, and vitamin C formulations.
Technical Grade
Designed for non‑food applications. Used in industrial cleaning (descaling boilers, heat exchangers, coffee machines, dishwashers), metal treatment (stainless steel passivation, rust removal), water treatment (chelating agent, boiler/cooling tower treatment), detergents (builder and water softener), drilling fluids, cosmetics (pH adjuster, ≤6%, pH ≥3.5), textile processing, and soldering flux.
Typical Specifications:
• Assay (anhydrous basis): 99.5% – 100.5%
• Water content: ≤0.5%
• Heavy metals (as Pb): ≤5 ppm
• Lead (Pb): ≤0.5 mg/kg
• Arsenic (As): ≤1.0 mg/kg
• Sulphate: ≤150 ppm
• Oxalate: ≤100 ppm
• Bacterial endotoxins (pharma grade): ≤0.5 IU/mg
Physical Properties (summary):
• Melting point: 153–159°C (with decomposition)
• Density: 1.67 g/cm³
• Bulk density: 560 kg/m³
• Solubility in water: 1174 g/L (10°C) → 3825 g/L (80°C)
• pH (1mM): 3.24 | pKa (20°C): 3.14
• Shelf life: 24 months when stored at 10-30°C, RH <70%
Every shipment includes a Certificate of Analysis (COA) and Material Safety Data Sheet (MSDS).
Production Process
Industrial anhydrous citric acid is produced via microbial fermentation of renewable carbohydrate feedstocks (corn syrup, molasses, or cassava) using Aspergillus niger. The process involves fermentation → purification (ion exchange + activated carbon) → crystallization → controlled dehydration (<0.5% moisture) → sieving → packaging.
Why Choose SNOWWHITE CHEMICAL?
1. Competitive, Factory Direct Pricing
We work directly with ISO‑certified manufacturing facilities, eliminating intermediary costs. Whether you order 1 MT or 100 MT, you receive wholesale pricing.
2. Strict Quality Control
Every batch is tested for assay, moisture, heavy metals, lead, arsenic, sulfate, oxalate, and (for pharma grade) bacterial endotoxins. Full traceability is maintained. Samples are retained for two years.
3. Reliable Global Logistics
We handle sea freight (FCL/LCL), air freight, and express courier to any major port.
Shipping documentation: COA, MSDS, commercial invoice, packing list, bill of lading, origin certificate
4. Professional Supply Experience
Since 2010, we have built long‑term partnerships with clients across more than 50 countries, including North America, Europe, South America, the Middle East, Southeast Asia, and Africa.
Common Questions
1. Anhydrous or monohydrate – which one should I use?
Anhydrous is the right choice for dry blends, effervescent tablets, and any formulation that cannot tolerate extra water (moisture≤0.5%). Monohydrate contains approximately 8% water and is generally used in liquid beverages. Most food and pharma customers prefer anhydrous for its higher concentration and faster dissolution.
2. Can I get a sample before placing a bulk order?
Yes. Free samples are available (buyer pays shipping). We recommend testing in your own formulation before ordering full quantities.
3. What is your typical lead time?
Production: 5–15 days. Sea freight to North America or Europe: 25-35 days; to Southeast Asia: 10‑20 days. Air freight is available for urgent orders.
Contact Us
Contact SNOWHITE CHEMICAL CO., LTD now to get COA, free samples and the latest quotation.
Email: shirley@snowhitechem.com
Phone: +86-25-56215758
WhatsApp：+86-13776524331
