Tristel DUO

Tristel DUO is a chlorine dioxide (ClO2) foam for the disinfection of non-invasive ultrasound transducers, transducer holders, cables, keyboards, and ultrasound stations.

Tristel DUO can be used on hard non-porous surfaces of other medical devices, for example colposcopes, mammography compressor plates, dialysis machines, and blood pressure cuffs.

  • description
  • how to use
  • chemistry
  • microbial efficacy
  • compatibility
  • safety
  • where to buy
  • resource downloads
  • description

    Tristel DUO is:

    • based on a unique chlorine dioxide foam chemistry
    • a cleaner and disinfectant in one
    • alcohol free and bleach free
    • tuberculocidal in a 1-minute contact time
    • effective against bloodborne pathogens and breaks down DNA and RNA
    • rated Category IV, the lowest hazard level (no safety warnings required)
    • used by healthcare professionals in 35 countries
    • EPA approved

    Precise and fast

    Tristel DUO is delivered in a novel dosing bottle. Tristel DUO Part A (sodium chlorite) and Part B (citric acid) are mixed when dispensed to generate 320 ppm chlorine dioxide. Each press of the pump delivers a consistent dose of chlorine dioxide foam, ensuring each patient receives the same level of protection.

    Tristel DUO is effective in a maximum contact time of 2 minutes, cutting reprocessing time in more than half and allowing you to see more patients. In contrast, many commonly used pre-wetted wipes and sprays need as long as 10 minutes to be effective.

    Compact and convenient

    Tristel DUO is compact and can follow the ultrasound probe, enabling quick device decontamination at the point of care. Compact design is not synonymous with small: each Tristel DUO bottle delivers approximately 310 doses of chlorine dioxide foam.

    Tristel DUO foam can be spread on a surface using a variety of dry wipes, allowing the user the convenience of choice.

    Due to its compact size and portability, Tristel DUO is easy to implement in a wide variety of areas where ultrasound is performed.

  • how to use


    Depress the pump to dispense Tristel DUO onto the surface or a cloth of your choice.
    Apply Tristel DUO to the surface.
    Allow the surface to remain visibly wet for the two (2) minute contact time.
    Reapply as necessary to ensure that the surface remains visibly wet for the entire contact time. Allow to air dry.
  • chemistry

    Tristel DUO utilises Tristel’s proprietary chlorine dioxide formulation. The chemical symbol for chlorine dioxide is ClO2.

    ClO2 is a powerful oxidizing agent that packs a punch. It destroys pathogens via electron exchange, sequestering electrons from the microorganism’s vital structures such as cell walls, membranes, organelles, and genetic materials. This causes a molecular imbalance leading to the microorganism’s death. This mode of action makes ClO2 highly effective, even at low concentrations.

  • microbial efficacy

    Tristel DUO is effective against:

    *VIRUSES (30-Second Contact Time)

    • Norovirus
    • Herpes simplex virus Type 1
    • Poliovirus Type 1
    • Adenovirus Type 5
    • 2009-H1N1 Influenza A virus
    • +Hepatitis B virus (HBV)
    • +Human Immunodeficiency virus Type 1 (HIV)

    MYCOBACTERIA (1-Minute Contact Time)

    • Mycobacterium bovis BCG
      (EPA approved surrogate of Mycobacterium tuberculosis)

    FUNGI (1-Minute Contact Time)

    • Trichophyton interdigitale
    • Candida albicans


    • Multi-Drug resistant Streptococcus pneumoniae
    • Multi-Drug resistant Acinetobacter baumannii (MDRAB)

    DRUG RESISTANT BACTERIA (2 Minute Contact Time)

    • Methicillin-Resistant Staphylococcus aureus (MRSA)
    • Carbapenem-resistant Klebsiella pneumoniae (CRE)

    BACTERIA (2-Minute Contact Time)

    • Pseudomonas aeruginosa
    • Staphylococcus aureus
    • Escherichia coli (E. coli) 0157:H7
    • Extended-spectrum beta-lactamase (ESBL) producing Escherichia coli (E.coli)
    • Neisseria gonorrhoea
    • Streptococcus agalactiae
    • Enterobacter cloacae
    • Staphylococcus epidermidis
    • Salmonella enterica
    • Serratia marcescens
    • Burkholderia cepacia

    Breaks down Deoxyribonucleic Acid (DNA) and Ribonucleic Acid (RNA).

    in health care settings or other settings in which there is an expected likelihood of soiling of inanimate surfaces/objects with blood/body fluids and in which the surfaces/objects likely to be soiled with blood/body fluids can be associated with the potential for transmission of HIV-1 (associated with AIDS) and HBV.

    Antimicrobial Products Registered with EPA for Claims Against Common Pathogens

    Tristel Duo is included in the following lists of antimicrobial products registered by EPA and is effective against common pathogens, as indicated in the list titles. EPA-registered antimicrobial products may not make efficacy claims against these pathogens unless the Agency has reviewed data to support the claim and approved the claim on the label.

    *When rare or novel viruses cause outbreaks of disease, there may be few if any disinfectants that have been tested and registered for use against that specific pathogen. To prepare for situations like these, EPA created the EVP guidance a voluntary process which allows disinfectant manufacturers to submit data to EPA demonstrating a product’s efficacy against difficult-to-inactivate viruses. In the event of an outbreak that meets certain criteria, EPA triggers the EVP guidance for a specific virus. In doing so, EPA authorizes companies whose products have EVP claims to make statements on their websites, social media, and technical literature about their product’s expected efficacy against the emerging virus.

  • compatibility

    Tristel DUO has been tested and confirmed to be compatible by major manufacturers, including:

    • Alpinion Medical
    • BD (Bard Access Systems, Inc.)
    • BK Medical
    • Butterfly Network
    • Canon Medical Systems (Toshiba)
    • Carestream
    • Fujifilm Healthcare (Hitachi)
    • GE Healthcare
    • Healcer
    • Mindray
    • Mobile ODT
    • Philips
    • Quantel Medical
    • Samsung Healthcare
    • Siemens Healthineers
    • SonoScape
    • SuperSonic Imagine
    • Verathon
  • safety


    Personal Protection
    When handling items soiled with blood or body fluids, use disposable latex gloves, gown, masks and/or eye coverings.

    Cleaning Procedure
    Blood/Body fluids must be thoroughly cleaned from surfaces and objects before application of Tristel DUO.

    Contact Time
    Allow surfaces to remain visibly wet for 30 seconds. This contact time will not control other common types of viruses and bacteria.

    Disposal of Infectious Material
    Blood and other body fluids should be autoclaved and disposed of according to local regulations for infectious waste disposal.

  • where to buy

    Tristel DUO is manufactured and marketed in the United States by Parker Laboratories, Inc. as licensed by Tristel.

    To order Tristel DUO, please:

    Call: 973.276.9500


    Order information

    Tristel is an English company specialized in chlorine dioxide technology for infection prevention in healthcare. Since 1993, Tristel has been developing tailored solutions for device reprocessing and has become one of the world’s leading providers of medical device disinfectants.

    Parker Laboratories, Inc. is the recognized world leader in manufacturing and marketing of accessories and supplies for the ultrasound and electromedical markets. Parker Laboratories is the licensed manufacturer and exclusive distributor of Tristel DUO in the USA.