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    Related: Organic Acid Propionic Acid GAA
    • Citric Acid CAS 77-92-9
    • Citric Acid CAS 77-92-9

    Citric Acid CAS 77-92-9

    Citric Acid, identified by CAS 77-92-9, is a high-purity organic tricarboxylic acid characterized by its strong sequestering capabilities and pH-buffering efficiency. Triethyl Citrate is a related citrate ester used as a formulation raw material. As a versatile citric acid, this technical-grade anhydrous citric acid functions as a primary scale remover and pH regulator in various industrial chelating agent formulation processes. This crystalline 2-hydroxy-1,2,3-propanetricarboxylic acid is valued for its ability to form stable complexes with multivalent metal ions, preventing precipitation and oxidation in industrial cleaning and metal treatment systems. Our facility provides competitive factory pricing and customized specifications regarding granulation sizes to ensure rapid dissolution and compatibility with specific manufacturing streams. For procurement and technical validation, we offer comprehensive MSDS, TDS, COA documentation and maintain consistent bulk supply for large-scale industrial operations.

    • CAS: 77-92-9
    • Synonyms: Anhydrous citric acid, 2-Hydroxy-1,2,3-propanetricarboxylic acid, Hydrogen citrate, Citronyle
    • Einecs: 201-069-1
    • Molecular Formula: C6H8O7
    • Grade: Food Grade / Pharma Grade / Industrial Grade
    • Package: 25kg Kraft Bag, 1000kg Jumbo Bag.
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    Product Description

    Citric Acid is the most widely used organic acid and pH-control agent in the food and beverage industry. It provides a sharp, clean, tart taste that enhances flavors in soft drinks and candies.

    Why choose our Anhydrous Citric Acid?

    1. Pure & Dry: Since it lacks water molecules in its crystal structure, it has a higher active acid content by weight compared to the Monohydrate form.
    2. Anti-Caking: It performs better in dry powder mixes (like seasoning blends or instant drink powders) because it is less prone to absorbing moisture and clumping under standard storage conditions.
    3. Corn Fermentation: Produced from natural corn starch, making it suitable for vegetarian, Halal, and Kosher dietary requirements.
    4. Solubility: It dissolves rapidly in water, releasing protons to lower pH effectively.
    1 Physicochemical Properties
    2 Applications
    3 Storage Conditions
    4 Safety Precautions

    Physicochemical Properties

    The table below represents the standard specification for Export Grade Anhydrous Citric Acid (BP/USP).

    ParameterSpecification
    AppearanceWhite crystalline granular or fine powder
    Assay (Purity)99.5% – 100.5%
    Water Content≤ 0.5% (Strictly controlled)
    Sulphated Ash≤ 0.05%
    Sulphate≤ 150 ppm
    Oxalate≤ 100 ppm
    Calcium≤ 200 ppm
    Heavy Metals≤ 5 ppm
    Lead (Pb)≤ 0.5 ppm
    Arsenic (As)≤ 1 ppm
    Mercury (Hg)≤ 1 ppm
    Aluminum≤ 0.2 ppm
    Bacterial Endotoxins< 0.5 IU/mg (For Pharma use)

    Applications

    1. Beverages (Carbonated Drinks):
      • Used extensively in colas, sodas, and energy drinks to provide the characteristic “sour” kick and buffer the pH to prevent spoilage.
    2. Confectionery & Food:
      • The white coating on sour gummies is often coarse Citric Acid. It also prevents sugar crystallization in jams and jellies.
    3. Cleaning & Detergents:
      • A powerful chelating agent and builder. It replaces phosphates in eco-friendly dishwasher tablets and laundry detergents to tackle hard water.
    4. Industrial Scaling:
      • Used to remove limescale from boilers and evaporators without corroding the metal equipment.
    5. Construction:
      • Sometimes used as a retarder in concrete and gypsum to slow down the setting time.

    Storage Conditions

    • Environment: Store in a cool, dry, and well-ventilated place.
    • Humidity Control: Although Anhydrous is more stable than Monohydrate, relative humidity (RH) should be kept below 50%. If the humidity is too high, the surface of the crystals can absorb moisture and eventually form hard lumps.
    • Palletizing: Use wooden or plastic pallets. Do not place bags directly on the concrete floor to avoid moisture transfer.
    • Shelf Life: 3 years if the bag remains sealed.

    Safety Precautions

    • Eye Irritation: Citric Acid is a strong eye irritant. If dust enters the eyes, it causes immediate stinging. Rinse with plenty of water for 15 minutes.
    • Skin Contact: Generally safe, but prolonged contact with concentrated solutions can cause irritation. Wash with soap and water.
    • Inhalation: Inhaling fine dust can irritate the respiratory tract. Workers should wear dust masks when dumping bags into mixers.
    • Enamel Erosion: Frequent direct consumption of pure citric acid powder can erode tooth enamel due to high acidity.

    FAQ - Technical & Supply Chain

    • Q:

      What is Citric Acid CAS 77-92-9?

      A: Citric Acid CAS 77-92-9 is 2-hydroxypropane-1,2,3-tricarboxylic acid, with the molecular formula C6H8O7 and EINECS number 201-069-1. This CAS number refers to the anhydrous form, which is a white crystalline powder with high purity and controlled moisture.
    • Q:

      What is the difference between anhydrous citric acid CAS 77-92-9 and citric acid monohydrate CAS 5949-29-1?

      A: Anhydrous citric acid is the water-free crystal form under CAS 77-92-9, while the monohydrate form contains one water of crystallization under CAS 5949-29-1. Anhydrous material is preferred for dry powder blends, effervescent products and applications needing tight moisture control, whereas monohydrate is commonly used in liquid beverages and general acidification.
    • Q:

      What are the main food and beverage applications of Citric Acid CAS 77-92-9?

      A: In food and beverages, Citric Acid is used mainly as an acidulant, flavor enhancer, pH regulator and preservative. Typical uses include soft drinks, confectionery, jams, canned fruit, dairy products and instant powder blends where a clean tart taste and controlled acidity are required.
    • Q:

      How is Citric Acid used in pharmaceutical and industrial applications?

      A: In pharmaceutical products, Citric Acid can act as a buffer, excipient, effervescent acid component and chelating agent. Industrial uses include limescale removal, boiler descaling, water treatment, metal finishing and passivation because its carboxylic groups chelate calcium and magnesium ions in hard water.
    • Q:

      What key specifications should be checked for food or pharmaceutical grade Citric Acid?

      A: Typical anhydrous Citric Acid specifications include assay or purity of 99.5-100.5 percent on an anhydrous basis, water content not more than 0.5 percent, and controlled limits for sulphated ash, sulphate, oxalate, calcium, heavy metals, lead and arsenic. Buyers should confirm the selected compendial or food standard and avoid confusing CAS 77-92-9 with citric acid monohydrate.
    • Q:

      How should Citric Acid CAS 77-92-9 be packaged and stored?

      A: This product is typically supplied in 25 kg kraft bags with PE liners and 1000 kg jumbo bags for bulk users. Store it in a dry, ventilated area below about 30 C and 65 percent relative humidity, keep containers sealed, and protect the material from moisture to prevent caking.

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