How to enhance viscosity of my shampoo?

I am new in cosmetics. I am working on my shampoo product. My formula is
SLS liquid = 11%
Cocamidopropyl betaine= 9%
Glycol Distearate=3%
Glycerine= 5%
Sodium chloride= 2%
EDTA = 0.2%
Methyl Paraben= .5%
Perfume = 0.5%
     The texture of shampoo is not enough viscous to meet the demands of customer. What should i do to enhance viscosity. By salt curves no more than 2% NaCl can be used. Is this formula correct or shomething needed to be changed? English is not my native language so pardon my mistakes.


  • SibechSibech Member, Professional Chemist
    You have too low a concentration of surfactants. "SLS Liquid" is likely at 30% concentration (check your documentation/supplier) which would yield an approximately 3.5% concentration of actual SLS.

    CAPB is also likely at 30% and therefore in total 3% in your formula.

    Increase the active matter (actual surfactant concentration) to get a thicker product.
    Dabbling Formulator — Qualified Cosmetic Safety Assessor — experienced in claim substantiation & EU regulatory affairs.
  • ozgirlozgirl Member, PCF student
    What is the concentration of active material in your SLS liquid?

    You may need to increase the amount of SLS in your formula.
  • hydroxypropyltrimonium chloride at 0.5  to 1%
  • Indeed, the amount of your anionic surfactant is a bit low. I'd actually replace it for SLES, which not only is more synergistic with yor Betaine, but is also less irritating to the scalp than SLS. 

    Btw, are you melting your Glycol distearate? 3% is quite high for your formula, it could affect foam and stability. Make sure to run a stability test.  
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