• Formulating

  Syndet shampoo bar with Varisoft

  Posted by bigziom on March 23, 2020 at 1:48 pm

  Hello,

  i am working on a solid shampoo bar made with Sodium Cocoyl Isethionate and Sodium Coco Sulfate. I would like to add Varisoft Eq 65 for some conditioning effect. Products with Varisoft Eq65 should be on the acidic side (pH around 4,5), otherwise this ingredient can hydrolise. The solid bar would be almost anhydrous but in contact with water. Is it necessary to adjust pH to 4,5 in this case?
  

  letsalcido replied 4 years, 11 months ago 2 Members · 1 Reply
• 1 Reply

• 

  letsalcido

  Member

  March 28, 2020 at 10:48 pm

  What is almost anhydrous, can you share your current formula?
  Maybe you could replace that amount of water with glycerine or a glycol.

  What is the current pH if you dissolve the bar 1:1 in DH2O?

  Since pH is the concentration of H+ in water, you can’t really control the external factors or the pH after it’s in contact with the water. Perhaps incorporating some Citric Acid into your formulation could help account for the surface layer of the soap becoming and staying hydrated for some time during use. You could test how much citric acid would be needed to bring the pH to 5 in a 1:1 dilution of your bar.

  Maybe someone more experienced should jump in. But this is what I would try.

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