Viscosity of Hand Sanitizer Gel

MurtazaHakimMurtazaHakim Member
edited April 2020 in General
Greetings to the forum members,

I formulated 5 litres Hand Sanitizer Gel following the below formulation.

1. Carbopol Ultrez 21 - 12 grams
2. Water - 1.485 litres
3. Ethanol 99.9% - 3.5 litres
4. Glycerine - 9 grams 
5. Triethanolamine - 6 grams

The sequence of formulation was as follows.
A. 12 grams of Carbopol Ultrez 21 is sprinkled to the vortex of the 1.485 litres of DM water in a beaker and mixed for 20 minutes at 650 RPM.
B. 3.5 litres of Ethanol 99.9% is added after 20 minutes of mixing at 650 RPM.
C. 9 grams of Glycerine is added after the addition of Ethanol. The solution at this stage appears hazy.
D. 6 grams of TEA is added at once finally and as soon as it is added the solution begins to appear clear.

However, the viscosity of the resultant product is not much promising.

Is the above method of dispersion and mixing correct or there are better methods of dispersing Carbopol Ultrez 21 ???

Comments

  • ngarayeva001ngarayeva001 Member
    edited April 2020
    It's impossible to read. Translate it into percentages and check the pH. There might be multiple reasons: not enough carbopol, the concentration of alcohol is higher than what carbopol can thicken, not enough TEA, so pH is still too low etc..
  • 1. Carbopol Ultrez 21 - 0.24 %
    2. Water -  29.46 %
    3. Ethanol 99.9% - 70 %
    4. Glycerine - 0.18
    5. Triethanolamine - 0.12 % 

    The pH of the final product was 6.35
  • BelassiBelassi Member, PCF student
    % carbomer seems too low, I would increase it to 0.33% and try again.
    Cosmetic Brand Creation. Concept to name to IMPI search to logo and brand registration. In-house graphic design inc. Pantone specs. Cosmetic label and box design & graphics.
  • you can also try pHing the carbomer before adding in alcohol
  • MarkBroussardMarkBroussard Member, Professional Chemist
    Ultrez-21 will not give you sufficient viscosity in a hydroalcoholic solution ... use Carbomer instead at 0.5%
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    See website for details www.desertinbloomcosmeticslab.com
  • @MarkBroussard Which carbomer do you suggest instead of Ultrez 21 ???

    Ultrez 21 provides acceptable clarity to the finished product which the other carbomer may not provide. 
  • em88em88 Member
    What is the expected viscosity you are looking for? 
  • @em88 I am looking for a viscosity of around 10,000 mm2/s 
  • MarkBroussardMarkBroussard Member, Professional Chemist
    Try Ultrez-10
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    See website for details www.desertinbloomcosmeticslab.com
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