I. Product Introduction

Citric Acid: Also known as Citric Acid, with the chemical formula C₆H₈O₇, it is a natural organic acid found in citrus fruits such as oranges and lemons, and is the most widely used food-grade organic acid and industrial additive globally. The mainstream products on the market are refined through grain fermentation technology, featuring high purity and good safety, in compliance with the national standard GB 1886.25 and the EU E330 food additive standard.

The product is usually colorless transparent crystals or white crystalline powder, odorless, with an extremely sour taste, easily soluble in water and ethanol, and its solution is slightly acidic. It possesses excellent pH regulation, metal chelation, antioxidant, antibacterial preservation, and other multiple properties. It combines the characteristics of natural gentleness and high efficiency for general use, spanning across various fields such as food, daily chemicals, industrial cleaning, chemicals, and pharmaceuticals, and is a necessary multifunctional basic raw material.

Part Two: Product Advantages and Features

Compared to other organic acids such as acetic acid, phosphoric acid, and lactic acid, citric acid stands out with its comprehensive advantages, suitable for the majority of applications.

• Mild and pure taste: The sourness is refreshing and soft, free from pungent and bitter odors, leaving a clean aftertaste. It is the preferred sour taste regulator in the food industry, far superior to artificial synthetic acidulants.

•Superior Metal Chelating Ability: Can combine with metal ions such as calcium, magnesium, iron, and copper to form stable soluble complexes, effectively eliminating color change, oxidation, scaling, and deterioration caused by metal ions, while also providing multiple functions such as anti-scaling, color protection, and preservation.

•Bacteria and mold inhibition, antioxidant: Can reduce the pH value of the system, inhibit the reproduction of harmful microorganisms such as mold, bacteria, and yeast, while delaying the oxidation of fats and browning of ingredients, significantly extending the shelf life of the product.

• Extremely High Safety: Naturally fermented, non-toxic, harmless, no residues, extremely low irritability, compliant addition with no safety hazards, can be directly contacted with food and skin, suitable for stringent civilian and food-grade applications.

• Excellent solubility and wide compatibility: Quickly dissolves in both cold and hot water, free of sediment and residue, strong compatibility, compatible with the majority of food additives, daily chemical raw materials, and industrial aids.

Excellent cost-performance: easy to obtain raw materials, mature technology, low consumption, fast onset, balancing efficiency and economy, suitable for large-scale industrial production and daily household use.

Chapter 3: Main Product Models

Market commercial citric acid is mainly divided into two core models, suitable for different usage scenarios, packaged in 25kg/bag, with customizable small packaging available.

Monohydrate citric acid (C₆H₈O₇·H₂O)

Contains 1 molecule ofwater of crystallization，crystals are uniformly granular, moisture-resistant, and does not easily clump. High storage stability. Main content ≥99.5%, moderate acidity, highest cost-performance ratio, the most widely used and mainstream type in the market, suitable for the majority of food flavoring, preservation, daily descaling, and basic daily necessities applications.

2. Anhydrous citric acid (C₆H₈O₇)

Anhydrous, higher purity (main content 99.5%-99.8%), stronger acidity per unit weight, betterPenetrationability, and faster dissolution rate. Resistant to high temperatures and high activity, suitable for high-end food, precision personal care, pharmaceutical raw materials, and high-precision industrial cleaning applications that require higher purity, acidity, and stability.

4. Product Material and Physical and Chemical Parameters

Core Material

Pure grain fermentation refined raw materials (corn, dried potatoes, etc., starch-based materials), free of industrial waste acid blending, free of impurities, free of heavy metal residues, food-grade purity, purity meets standards, compliant and safe.

2. Key Physical and Chemical Parameters

• Appearance: White crystalline powder/granules, odorless, non-caking

• pH value of solution: 2.1 (2% solution, room temperature)

• Density: 1.542-1.665 g/cm³

• Heat stability: Decomposes above 175°C, stable under normal temperature storage

• Execution Standard: GB 1886.25-2016, E330 Food Additive Standard

• Impurity Index: All harmful substances such as heavy metals, arsenic, lead, etc. comply with food-grade limit standards.

V. Core Functions

Relying on the three core characteristics of acidity, chelating, and pH regulation, it achieves six core functions to cover full-scene demands:

•Acidity Regulation/Aroma Enhancement: Adjusts the pH balance, neutralizes alkaline taste, enriches flavor depth, removes fishiness and richness, balances sweetness, creating a refreshing and layered mouthfeel for drinks and food.

•Bacteriostatic and Antimicrobial Preservation: Lower the environmental pH to destroy the survival environment of microorganisms, inhibit the growth of bacteria and molds, delay the spoilage and deterioration of ingredients, and extend the shelf life of food and daily chemical products.

•Metal Chelating Color Protection: Complexes metal ions, prevents browning of food, yellowing of water, and oxidation failure of raw materials, stabilizing product color and quality.

•Scalp, rust and soften water quality: Dissolves scale, limescale, rust, softens hard water, removes deposits from equipment and utensils, non-harmful to materials, no corrosive residue.

• Antioxidant Protection: Synergistic antioxidant ingredients delay the oxidation and inactivation of oils and active ingredients, protecting the stability of effective components in food and skincare products.

• Emulsion Stability: Stabilizes emulsion and beverage systems, prevents protein precipitation, stratification, and flocculation, enhancing product uniformity and stability.

6. Recommended Uses (Detailed Full-Scene Segmentation)

1. Food Industry (Core Main Scenario)

Widely used in products such as beverages, juices, sodas, yogurt, candies, jellies, jams, candied fruits, canned goods, baking, dairy products, and aquatic product processing. It is used for flavoring and increasing acidity, balancing sweetness, removing fishy odors, preserving color and freshness, while also stabilizing the dairy system, preventing separation and sedimentation, and extending the shelf life of food.

2. Personal Care & Beauty Industry

For facial toners, cleansers, shampoos, face masks, and other skincare products, adjusts product pH, gently soothes the skin, balances the acid-alkaline skin texture, enhances product stability, reduces irritation, and simultaneously assists in brightening and softening the skin's keratin.

3. Industrial Cleaning and Water Treatment

Descaling and cleaning for boilers, pipelines, electric water heaters, drinking water machines, central air conditioning, and other equipment; hard water softening treatment, chelating calcium and magnesium ions in water, preventing scaling and clogging of equipment, gentle rust and scaling removal, low corrosion, no residue, suitable for precise equipment cleaning.

4. Pharmaceuticals and Fine Chemicals

Used as pharmaceutical raw materials, buffering agents, flavoring agents, chelating agents, to adjust the pH of pharmaceuticals and improve taste; used in chemical synthesis, electroplating additives, and metal surface treatment, to stabilize reaction systems and remove metal impurities.

5. Residential household scenarios

Household kettle, humidifier, faucet, and shower head descaling and cleaning; clothing color retention, yellow removal, and water softening; mild pesticide removal and odour elimination for fruits and vegetables, safe and gentle, suitable for daily household use.

Section 7: Storage and Usage Precautions

•Storage: Store in a cool, dry, well-ventilated area, sealed to prevent dampness and absorption of moisture, exposure to high temperatures, and keep away from alkaline substances.

• Usage: Dissolve as required, can be dissolved in both cold and hot water; avoid prolonged contact with skin and mucous membranes with high concentration solutions, and wash immediately after operation.

• Taboo: Do not mix or store with strong alkalis or oxidizing materials.

| (Note: Some content may be generated by AI)