Basic Product Information
Product Name: Citric Acid Anhydrous
Alias: 2-Hydroxypropane-1,2,3-tricarboxylic acid
Chemical Name: Citric Acid Anhydrous
Molecular Formula: C₆H₈O₇
Molecular Weight: 192.13
CAS No.: 77-92-9
HS Code: 2918.14
Payment Terms: T/T, L/C
Trade Terms: FOB, CFR, CIF
MOQ20GP ≈ 20-25MT
Appearance: Colorless transparent crystals or white crystalline powder, uniform particle size, no caking, no black spot impurities and no mechanical foreign matters. Odorless with an extremely sour taste, dry and fluffy powder with excellent fluidity.
Product Introduction: Citric Acid Anhydrous is the most widely used organic acid basic raw material in the world, produced by refined fermentation technology using corn, dried sweet potato and other grain raw materials with high purity and extremely low impurities. The product is divided into general industrial grade and food grade. The food grade strictly complies with GB 1886.235-2016 national standard and meets international food and pharmacopoeia standards including FCC, USP, BP and E330. The industrial grade executes GB/T 8269-2006 industry standard. Featuring excellent acidity regulation, metal chelation, anti-oxidation, color protection and buffer stabilization performance, it has outstanding water solubility, mild reaction and non-toxic safety. Widely applied in food and beverage, daily chemical and beauty, fine chemical industry, electroplating cleaning, building material retarding, pharmaceutical accessories and other fields, it is an indispensable core raw material for industrial production and food processing.
2. Physical and Chemical Properties
The product is white or colorless crystalline powder with pure and strong sour taste and no peculiar smell. It maintains excellent stability and is not easy to deteriorate or weather under normal temperature and dry environment. It has slight hygroscopicity in humid air. Compared with monohydrate citric acid, the anhydrous type features lower moisture content, stronger storage stability and better anti-caking performance. It is extremely soluble in water with fast dissolution speed, forming clear and transparent aqueous solution without sediment or impurities. The pH value of 1% aqueous solution is about 2.3 with mild and stable acidity. It is soluble in ethanol and slightly soluble in ether and other organic solvents. With a density of 1.67g/cm³ and melting point of 153-159℃, it will decompose gradually above 175℃. Owning excellent metal chelating capacity, it can efficiently complex calcium, magnesium, iron, copper and other metal ions, delivering superior anti-oxidation, color protection, bacteriostasis and water softening effects. The uniform and dry powder is highly adaptable to automated continuous feeding production lines.
3. Executive Standards & Technical Specifications (Dry Basis)
Executive StandardGB/T 8269-2006 Industrial Citric Acid, GB 1886.235-2016 Food Additive Citric Acid, compliant with FCC/USP/BP/E330 international standards
Product Grade: General Industrial Grade, Food Grade
4. Core Product Characteristics
1. High Purity & Stable Performance: The main content is steadily above 99.5% with strictly controlled trace impurities such as sulfate, oxalate, heavy metals and arsenic. Adopting anhydrous low-moisture formula, it features high temperature resistance, excellent storage durability and anti-caking capacity without batch index fluctuation, perfectly adapting to high-precision production processes compared with monohydrate citric acid.
2. Powerful Chelation & Superior Anti-Oxidation & Color Protection: With a ternary organic acid structure, it possesses strong metal ion complexing ability, which can effectively chelate calcium, magnesium, and iron ions in water and raw materials, thereby preventing oxidative browning, precipitation, and turbidity. It delivers outstanding color preservation and anti-oxidation effects, serving as a core color protection stabilizer for the food and daily chemical industries.
3. Rapid Dissolution & Clear SolutionIt has excellent water solubility, dissolving completely and rapidly at room temperature without residues or floating impurities. The aqueous solution is colorless, transparent and stable in pH value, suitable for precise proportioning, sterile production, high-end daily chemical and fine food processing scenarios.
4. Pure Acidity & Excellent Buffer Performance: It has pure and mild sour taste without peculiar odor with precise and controllable pH adjustment. Possessing superior acid-base buffer capacity, it can stabilize the pH value of the system, prevent formula stratification, deterioration and failure, and adapt to the improvement of various formula systems.
5. Non-Toxic & High Compliance: Food grade is non-toxic, residue-free, and completely metabolizable by the human body with no intake limit. It complies with multiple domestic and international food and medical safety standards, and can be directly used in high-end safe applications such as food additives, pharmaceutical excipients, and maternal and infant daily chemicals.
6. High-Quality Powder & Automatic Production Adaptation: Uniform crystals, dry and fluffy texture and good fluidity effectively avoid dust and material blockage. It supports precise feeding and continuous mass production of automated assembly lines without equipment jamming or caking, greatly improving production efficiency.
7. Full-Scenario Adaptation & High Cost Performance: Complete grades and wide application coverage adapt to food, daily chemical, industrial, medical and building material fields. Mass-produced by source factories with stable quality and prominent price advantages, it maintains extremely high cost performance for long-term supply.
5. Main Application Fields
Food Processing Industry (Food Grade Exclusive): As a national standard compliant food additive, it is mainly used as acidity regulator, flavor improver, anti-oxidation color fixative, preservative and dough leavening auxiliary. Widely applied in carbonated drinks, fruit juices, candies, chocolates, baked pastries, canned food, preserved fruits, dairy products, frozen food and wine brewing, it optimizes product flavor, inhibits bacterial growth, prevents ingredient oxidative discoloration and extends shelf life, ranking as the most widely used organic acid raw material in the food industry.
Daily Chemical & Beauty Industry: Applied in facial cleanser, toner, facial mask, emulsion, shampoo and other washing and care products, it acts as a pH regulator, mild exfoliant and anti-oxidation stabilizer. It balances formula pH value, improves product mildness, delays raw material oxidative deterioration, and balances skin care effect and formula stability, suitable for the production of sensitive skin daily chemical products.
Fine Chemical & Electroplating Industry: Used as chemical chelating agent, catalyst, buffer and synthetic auxiliary; it serves as a special complexing agent and metal surface cleaner in electroplating industry, which can soften water quality, remove metal oxide layers, improve coating uniformity and adhesion, optimize electroplating process effect and reduce coating defects.
Cleaning & Water Treatment Industry: As a phosphorus-free environmental-friendly cleaning auxiliary, it is used for boiler descaling, pipeline derusting, household appliance descaling and industrial equipment cleaning. In sewage treatment, it adjusts water pH value, chelates heavy metals, purifies and softens water with environmental protection performance and thorough cleaning effect.
Construction & Concrete Industry: Used as a special concrete retarder and water-reducing auxiliary, it delays cement solidification speed, prolongs construction window period, improves concrete fluidity and compactness, and prevents building material cracking and delamination, widely used in large-scale engineering and commercial concrete production.
Pharmaceutical & Biological Industry: Served as acidity regulator, pharmaceutical auxiliary, sustained-release agent and hemodialysis auxiliary for pharmaceutical preparations, it stabilizes the acid-base system of pharmaceuticals and improves drug stability. It is also used for pH control in biological fermentation processes to ensure strain activity and fermentation efficiency.
Textile Printing & Dyeing Industry: Used as fabric pH regulator, leveler and metal ion chelating agent to remove residual impurities on fabric surface, stabilize dyeing effect, prevent fabric yellowing and discoloration, and improve the color uniformity and weather resistance of printed and dyed finished products.