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Technical Information



  • Colourlock Industries Ltd is a New Zealand company with over 20 years experience in antibacterial and antimicrobial product development. Viropac was specifically developed for national pandemic planning to assist management of a pandemic.

  • Viropac is a hospital grade disinfectant with proven efficacy against a wide range of viruses and bacteria including, Human Coronavirus including SARS, Bird Flu H5N1 & H1N1, Salmonella choleraesuis, Campylobacter, E. coli 0157:H7, Listeria, Hong Kong (Influenza), Hepatitis B & C, Staphylococcus aureus, Pseudomonas aeruginosa, HIV/AIDS, Herpes Simplex Type 1 & 2,  and many other common bacteria and viruses. (See the following list)

  • Viropac is safe to use. It is non-corrosive, non-flammable, non-bleaching and contains no phosphates, phenolics, chlorine or dangerous glutaraldehydes.

  • Viropac is biodegradable, extremely economic to use and has a shelf life of over 10 years.

  • Viropac continues to inhibit viral and bacterial growth for over 4 hours after drying on surfaces.

  • Viropac is ideal for routine cleaning and disinfecting of workplaces to minimize viral and bacteria transfer via work surfaces, door handles and equipment such as keyboards and telephones where large numbers of viruses and bacteria are found.


Viropac has been microbiologically tested and proven effective against a wide range of gram-positive and negative organisms including:-



  • Human Coronavirus including SARS

  • Influenza virus H5N1

  • Influenza virus H1N1

  • Influenza virus (Hong Kong)

  • Hepatitis B & C

  • Norwalk virus

  • HIV

  • Aids Virus

  • Influenza A/Brazil

  • Herpes Simplex Type I

  • Herpes Simplex Type II

  • Vaccinia



  • Aspergillus niger

  • Penicillium italicum

  • Trichophyton mentagrophytes



  • Bacillus subtilis - gram positive

  • Brevibacterium ammonagenes - gram positive

  • Camplyobacter jejuni - gram negative

  • Clostridium perfringens - gram positive

  • Enterobacter aerogenes - gram negative

  • Escherichia coli (Includes O157:H7) - gram negative

  • Klebsiella pneumoniae - gram negative

  • Listeria monocytogenes - gram positive

  • Proteus vulgaris - gram negative

  • Pseudomonas aeruginosa - gram negative

  • Pseudomonas cepacia - gram negative

  • Salmonella Brandenburg - gram negative

  • Salmonella choleraesuis - gram negative

  • Salmonella schottmuelleri - gram negative

  • Salmonella typhimurium - gram negative

  • Serratia marcescens - gram negative

  • Shigella dysenteriae - gram negative

  • Staphylococcus aureus (MRSA) - gram positive

  • Streptococcus faecalis - gram positive

  • Streptococcus pyogenes - gram positive

  • Vibro cholerae - gram negative

Viropac passes the following AOAC (The Association of Analytical Communities) tests: 


  • Disinfectant - AOAC Use Dilution Test at 5% Organic Soil (Blood Serum).

  • Disinfectant - AOAC Use Dilution Test with 400 ppm hard water (as CaCO3) and 5% Organic Soil (Blood Serum).

  • Sanitiser - AOAC Germicidal and Detergent Sanitiser Test with 800 ppm hard water (as CaCO3) and 5% Organic Soil (Blood Serum).

  • Sanitiser - AOAC Germicidal and Detergent Sanitiser Test with 1100 ppm hard water (as CaCO3) and 5% Organic Soil (Blood Serum).

  • Fungicide - AOAC Disinfectants Fungal Test with 5% Organic Soil (Blood Serum).

  • Virucide - EPA Guidelines with 400 ppm hard water (as CaCO3) and 5% Organic Soil (Blood Serum).



New Zealand Food Safety (C31)


United States EPA (6836-70)


Appearance: Clear - light yellow liquid.

Odour: Faint, pleasant odour.

Boiling point: Initial Boiling Point at 100ºC.

Density @ 20ºC (Kg/Lt.): 1.02.

Solubility in water: Complete.

Melting point: Not applicable.

Vapour pressure: < 0.01 mm Hg @ 20ºC

pH: 6 - 8 (Neutral)

Evaporation rate: Same as water.

Flammable limits (LEL): Not applicable.

Flammable limits (UEL): Not applicable.

Auto ignition temperature: Not applicable.

Foaming Properties: Slight.

Dangerous Goods Rating: Not applicable

Shelf Life: 10+ years


  • 5-litres of Viropac concentrate makes 250 litres of Viropac spray solution for use in a pandemic.

  • It is estimated that 5-litres of Viropac concentrate will be sufficient for up to 10 office users or one residential home for at least 90 days of a flu pandemic.


During the 20th century, pandemics caused millions of deaths, social disruption and profound economic losses worldwide. Experts agree that another pandemic is certain to happen but are unable to say when.

The World Health Organisation has advised that the risk of another pandemic is high.

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The objective of pandemic planning is to enable countries to be prepared to recognise and manage an influenza pandemic. Planning may help to reduce transmission of the pandemic virus strain, to decrease cases, hospitalisations and deaths, to maintain essential services and to reduce the economic and social impact of a pandemic.

The New Zealand Government has instructed Essential Services, businesses and households to take prudent steps to prepare for a flu pandemic.

Viropac is a critical component in every flu pandemic response plan.


 By Air - Passed from person to person through the air by breathing in air containing droplets or aerosols containing the virus produced when an infected person talks, coughs or sneezes.

Solution - Wearing of suitable facemasks

Through Contact - Touching a surface contaminated with the virus and then touching your face or mouth. Many viruses remain active on surfaces for many hours after contamination.

Solution - Treatment of surfaces with Viropac



By implementing simple strategies and control measures the impact of pandemics can be significantly minimised.

  • Improved workplace cleaning

  • Improved personal hygiene

  • Social distancing

  • Wearing of face masks

The key to any pandemic control strategy is to implement:


There are numerous issues to consider when selecting a disinfecting agent. The chart below gives a direct comparison of the properties of household bleach (usually containing about 5% sodium hypochlorite), alcohol sprays (usually between 70-100% ethyl or isopropyl alcohol) and Viropac.

Viropac Comparison Chart PDF

Viropac Safety Data Sheet PDF