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Disinfectant Dilution Calculator.

Compute exact concentrate and diluent volumes for Clidox-S, MB-10, Virkon-S, bleach, CaviCide, and Spor-Klenz. Includes contact times, PPE requirements, and freshness windows.

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Validated2026-04-08
CitableMethods and citation included

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Load example disinfectant dilution calculator data to see the full workflow

Disinfectant Selection

Total ready-to-use solution volume

Required fields
  • Total volume must be a positive number.

When to use

  • Calculating how much concentrate to add for a batch of working solution
  • Training new vivarium staff on proper dilution procedures
  • Posting dilution instructions at cage wash and prep areas
  • Documenting disinfection protocols for IACUC or AAALAC

Do not use for

  • Selecting a disinfectant for a specific pathogen (consult biosafety)
  • Industrial-scale CIP (clean-in-place) systems
  • Formulating custom disinfectant blends

Label All Working Solution Containers

Label all working solution containers with: product name, dilution, date prepared, expiration date, and preparer initials.

Clidox-S Color Indicates Activation

Clidox-S turns yellow when activated properly. If it stays colorless, the base component may be depleted.

Never Mix Bleach with Ammonia

Never mix bleach with ammonia-based cleaners — this produces toxic chloramine gas.

Avoid Hot Water for Bleach Dilution

Using hot water to dilute bleach accelerates decomposition and reduces efficacy.

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Method

Each disinfectant has a manufacturer-specified concentrate fraction. The calculator computes: concentrate_mL = total_volume ×\times fraction, diluent_mL = total_volume − concentrate_mL. Profiles include contact times, PPE, freshness windows, and mixing notes from manufacturer data sheets.

2

Validated

Last validated 2026-04-08. Calculations are designed for planning and documentation support; verify procurement decisions against manufacturer specifications or institutional SOPs.

3

How to cite

How to Cite

ConductScience Disinfectant Dilution Calculator (v1.16.0). ConductScience. https://conductscience.com/tools/disinfectant-dilution-calculator

National Research Council. Guide for the Care and Use of Laboratory Animals. 8th ed. Washington, DC: The National Academies Press; 2011.

Disinfection Best Practices in Animal Facilities

Effective disinfection is critical for maintaining pathogen-free vivarium environments. Key principles:

Contact time matters: The single most common error in vivarium disinfection is wiping surfaces before the required contact time has elapsed. A 10-minute contact time means the surface must remain wet with disinfectant for the full 10 minutes.
Cleaning before disinfecting: Organic matter (bedding, food, feces) inactivates most disinfectants. Always clean surfaces of visible debris before applying disinfectant. The standard workflow is: remove gross debris → clean with detergent → rinse → apply disinfectant → wait contact time → rinse if required.
Rotation and resistance: Some facilities rotate between disinfectant classes (oxidizing, quaternary ammonium, phenolic) to prevent resistance. While bacterial resistance to disinfectants is less clinically significant than antibiotic resistance, biofilm formation can reduce efficacy over time.
Common disinfectant classes in vivaria: - Chlorine dioxide (Clidox-S): Fast-acting, broad-spectrum, relatively safe - Quaternary ammonium (MB-10): Economical, low toxicity, good surface compatibility - Peroxygen (Virkon-S): Excellent virucidal activity, pink color indicates potency - Sodium hypochlorite (bleach): Inexpensive, effective, but corrosive and unstable - Alcohol + quaternary ammonium (CaviCide): Ready-to-use convenience for procedure areas

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