Pharm-Rx Calcium Carbonate

Pharm-Rx Calcium Carbonate contains the mineral calcium carbonate and operates in over-the-counter (OTC) functions within pharmaceuticals and nutraceuticals. Classified as an active pharmaceutical Ingredient (API) under pharmaceutical actives and precursors within pharmaceuticals and nutraceuticals technologies, it's utilized in various pharmaceutical formulations for its calcium-based properties.

Chemical Name: Calcium Carbonate

CAS Number: 471-34-1

Chemical Inventories: AICS (Australia), DSL (Canada), ECL (Korea), EINECS (EU), ENCS (Japan), IECSC (China), NDSL (Canada), NZIoC (New Zealand), PICCS (Phillipines), TCSI (Taiwan), TSCA (USA)

Certifications & Compliance: British Pharmacopeia (BP), California Proposition 65, European Pharmacopeia (Ph. Eur.), FCC Compliant, FDA 29 CFR 1910.1200, FSSAI, Generally Recognized As Safe (GRAS), United States Pharmacopeia (USP)

Synonyms: CaCO3

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    Identification & Functionality

    Chemical Family
    Chemical Name
    Ingredient Name
    Mineral Type
    Pharma & Nutraceuticals Functions
    Molecular formula
    Product Families

    Calcium Carbonate, dried at 200°C for 4 hours, contains calcium equivalent to not less than 98.0% and not more than 100.5% of calcium carbonate (CaCO₃).

    Chemical Structure

    Pharm-Rx Aluminum Hydroxide Gel - Chemical Structure - 1

    Applications & Uses


    Physical Form
    White gran. powder
    Physical Properties
    ValueUnitsTest Method / Conditions
    Particle Size (Through 16 mesh)100%-
    Particle Size (Through 18 mesh)100%-
    Particle Size (on 60 mesh)59.45%-
    Particle Size (Through 200 mesh)6.72%-
    Tapped Density1gm/ml-
    Chemical Properties
    ValueUnitsTest Method / Conditions
    Heavy Metals (as Lead)max. 5ppm-
    Lead Contentmax. 0.1ppm-
    Cadmium Contentmax. 0.2ppm-
    Mercury Contentmax. 0.1ppm-
    Arsenic Contentmax. 0.5ppm-
    Acid Insoluble (Sub.)0.08%-
    Sulphate Contentmax. 0.20%-
    Chloride Contentmax. 250ppm-
    Iron Contentmax. 0.002--
    Fluoride Content0.002%-
    Moisture Content0.48%-
    Magnesium Contentmax. 1.0%-
    Assay Content (as Calcium carbonate)94.73%-
    Assay Content (as Calcium)37.93%-
    Typical Properties
    ValueUnitsTest Method / Conditions
    Molecular Weight100.09
    Microbiological Values
    ValueUnitsTest Method / Conditions
    Total Aerobic Countmax. 10cfu/gm-
    Total Moulds & Yeast Countmax. 10cfu/gm-
    SalmonellaAbsent/10gUSP 37 <2022>
    Pseudomonas aeruginosaAbsent/g-
    Staphylococcus aureusAbsent/g-

    Regulatory & Compliance

    Certifications & Compliance
    Chemical Inventories
    FDA Disclaimer

    These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

    USP Reference Standards
    • USP Sodium Fluoride RS

    Storage & Handling

    Storage Information

    Preserve in well-closed containers.