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    • Citric Acid CAS 77-92-9
    • Citric Acid CAS 77-92-9

    Citric Acid CAS 77-92-9

    Citric Acid, anhydrous, CAS 77-92-9, is a white crystalline acidulant and pH-control agent supplied for food, pharmaceutical and industrial use. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

    • 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 CAS 77-92-9 is 2-hydroxypropane-1,2,3-tricarboxylic acid with the molecular formula C6H8O7.

    Synonyms: Anhydrous citric acid; 2-Hydroxy-1,2,3-propanetricarboxylic acid; Hydrogen citrate; Citronyle.

    CAS: 77-92-9.

    It has the molecular formula C6H8O7 and a molecular weight of 192.12 g/mol.

    This CAS number refers to the anhydrous form, which is a white crystalline powder with high purity and controlled moisture.

    Anhydrous citric acid is preferred for dry powder blends, effervescent products and applications needing tight moisture control.

    It dissolves rapidly in water and lowers pH effectively.

    In food and beverages, it is used as an acidulant, flavor enhancer, pH regulator and preservative.

    Typical uses include soft drinks, confectionery, jams, canned fruit, dairy products and instant powder blends.

    In pharmaceutical products, it 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.

    Its carboxylic groups chelate calcium and magnesium ions in hard water.

    A typical specification includes assay of 99.5–100.5% on an anhydrous basis and water content of at most 0.5%.

    Limits for sulphated ash, sulphate, oxalate, calcium, heavy metals, lead and arsenic are controlled to meet typical compendial or food standards.

    Confirm appearance, assay, water content, sulphated ash, sulphate, oxalate, calcium, heavy metals and residue limits.

    Store in a dry, ventilated area, keep containers sealed and protect the material from moisture to prevent caking.

    Confirm packaging with the requested quantity and destination requirements.

    The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

    For an RFQ, state the intended use, required grade and specification, quantity, packaging, destination and document needs.

    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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