Sterility Test
Medical Analyses

Sterility Test

    Sterility Testing ISO 11737-2

    Sterility testing is a critical quality control procedure used to determine whether products that must be sterile are contaminated by any microorganisms. This test is applied across various industries—ranging from medical devices, pharmaceuticals, biocidal products, and cosmetics to food—to verify the effectiveness of sterilization processes and assure the microbiological safety of products. Sterility testing is essential to prove compliance with legal regulations and international standards.


    Purpose and Importance of Sterility Testing

    1. Preventing Microbial Contamination

      • Ensures that products are free from any microbial contamination during production and packaging.
    2. Protecting Consumer Health

      • Guarantees that sterile products are safe for end-users.
    3. Meeting Regulatory Requirements

      • Confirms the conformity of products with pharmaceutical, medical device, and cosmetic standards.
    4. Verifying Sterilization Processes

      • Assesses the effectiveness of sterilization methods to validate production protocols.

    Applications of Sterility Testing

    Sterility testing is performed on a wide variety of products in several sectors:

    • Pharmaceutical Products

      • Sterile items such as injectable solutions, IV fluids, ophthalmic preparations, and implants
    • Medical Devices

      • Surgical instruments, implants, catheters, and other sterile medical materials
    • Biocidal Products

      • Antiseptics, disinfectants, and sterilization solutions
    • Cosmetic Products

      • Eye-area cosmetics, sterile skincare items, and other sensitive cosmetic formulations
    • Food & Nutrition

      • Infant formulas and specialized nutrition products

    Sterility Testing Procedure According to ISO 11737-2

    Sterility testing is conducted under sterile laboratory conditions to detect any microbial contamination. The general steps include:

    1. Sample Preparation

      • Products are sampled in a sterile environment.
      • The testing method is chosen based on the product form (liquid, solid, gel, powder).
    2. Testing Methods
      Two primary methods are used for sterility testing:

      • Membrane Filtration Method

        • Ideal for liquid products
        • The sample passes through a membrane filter designed to capture any microorganisms
        • The filter is then incubated in appropriate growth media
      • Direct Inoculation Method

        • Used for solid, gel-based, or viscous products
        • A portion of the product is directly added to growth media (e.g., Fluid Thioglycollate Medium or Soybean Casein Digest Medium)
    3. Incubation Period

      • Samples are incubated for 14 days at specified temperatures (e.g., 20–25°C and 30–35°C)
      • Checked regularly for any signs of microbial growth
    4. Result Evaluation

      • After incubation, the growth media are inspected for turbidity, color change, or colony formation
      • If no microbial growth is observed, the product is considered sterile

    Relevant Standards for Sterility Testing

    Sterility tests are performed according to internationally recognized standards:

    • USP <71> – United States Pharmacopeia Sterility Testing
    • EP 2.6.1 – European Pharmacopoeia Sterility Testing
    • ISO 11737-2 – Sterility testing standard for medical devices
    • JP (Japanese Pharmacopoeia) – Sterility testing in Japan

    Why Sterility Testing Matters

    1. Consumer Safety

      • Confirms that products are microbiologically safe and free from health hazards
    2. Regulatory Compliance

      • Ensures adherence to regulations for pharmaceuticals and medical devices
    3. Production Process Validation

      • Verifies the reliability of manufacturing and sterilization procedures
    4. Brand Credibility

      • High-quality, reliable sterile products enhance consumer trust in the brand

    Sterility Testing Services at TTS Laboratory Services

    At TTS Laboratory Services, we offer comprehensive sterility testing services:

    • Sterile Laboratory Conditions

      • All tests are performed in a sterile environment
    • Membrane Filtration and Direct Inoculation

      • Appropriate testing methods applied based on the product type
    • Compliance with Regulatory Standards

      • Tests conform to USP, EP, and ISO guidelines
    • Fast and Reliable Results

      • Delivering accurate outcomes for your products
    • Detailed Reporting

      • Providing internationally recognized reports with in-depth analysis

    Sterility testing is vital for ensuring sterile products’ reliability and compliance with national and international regulations. It protects consumer health and validates product manufacturing processes. At TTS Laboratory Services, we test your products for sterility according to global standards, helping you safeguard consumer health and meet regulatory requirements.

    As TTS Laboratory Services, we stand by your side with our accredited analysis scope to meet all your testing needs.