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Frequently Asked Question - Biological Safety
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 Summary
of Practical Biological Disinfectants
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A Summary of Practical Disinfectants
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Disinfectant
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Dilution
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Contact time (minutes)
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Irritant type
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Lipovirus
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Broad-Spectrum
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Skin
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Eye
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Respiratory
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Quaternary ammonium cpds. (L)
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0.1-2.0%
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10
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Not effective
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Yes
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Yes
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No
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Phenolic cpds. (L)
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1.0-5.0%
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10
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Not effective
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Yes
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Yes
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No
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Chlorine cpds. (L)
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500ppm*
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10
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30
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Yes
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Yes
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Yes
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Iodophor cpds. (L)
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25-1600ppm
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10
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30
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Yes
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Yes
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No
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Ethyl alcohol (L)
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70-85%
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10
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Not effective
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No
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Yes
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No
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Isopropyl alcohol (L)
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70-85%
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10
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Not effective
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No
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Yes
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No
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Formaldehyde (L)
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0.2-8.0%
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10
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30
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Yes
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Yes
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No
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Glutaraldehyde (L)
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2%
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10
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30
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Yes
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Yes
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No
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Ethylene oxide (G)
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8-23g/ft3
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60
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60
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Yes
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Yes
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Yes
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Paraformaldehyde (G)
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0.3g/ft3
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60
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60
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Yes
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Yes
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Yes
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L = liquid; G = gas
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*Commercially available chlorine bleach is 5.25% chlorine
(52,200 ppm). A dilution of 1 to 100 will yield a 525 ppm
solution, which is suitable for disinfecting purposes.
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