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Sunday, September 4, 2011

New avian flu virus (strain) protection: hydroalcoholic hand sanitizing gels

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To protect yourself against avian influenza (in the absense of washing facilities) you can  use alcohol sanitizer in these situations: 
  • after shaking hands
  • exchanging money
  • before eating
  • after using the bathroom
  • touching of a doorknob
  • pushing elevator buttons
  • answering a telephone
  • contacting other in public areas

Hydroalcoholic gels basically contain four major ingredients:
  • alcohol
  • water
  • rheology modifier
  • neutralizer

[ See Alcohol Sanitizing Gel 1 Formulation (with 4 ingredients) ]

The effectiveness of the sanitizer using alcohol depends on the amount and type of alcohol. 

The FDA recommendation:
• Ethanol at 60-95 v/v%
• Isopropanol at 70-91.3 v/v%.

Below is another hydroalcoholic hand sanitizing gel formulation:

                     Alcohol Sanitizing Gel 2

Deionized Water
38.66
Acrylates / C10 -30 Alkyl Acrylate Cross polyner
0.25
Propylene Glycol
0.5
Ethanol, 96% wt
60
PEG/PPG-8/3 Laurate
0.5
Aminimethyl Propanol
0.09

Procedure:

1. Sprinkle Acrylates / C10 -30 Polymer onto the surface of deionized water. Wait until the polymer has completely “wet out”. Begin gentle agitation (200 rpm) for 5 minutes.

2. Add the remaining ingredients to batch in the order listed and mixing until uniform.

3. Neutralize batch with Aminimethyl Propanol and mix until uniform.

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