hand wash formula - Cosmetic Science Talk

hand wash formula

edited December 2016 in Formulating
hi all,

i have a hand soap formula that i would like to confirm  if all parameters are ok:

sls                                   6.4%
cocamidopropyl betaine     2.9%.
glycerin                              0.7%.
sodium chloride                  0.55%.
cocamide monoethanolamide   0.43%.
fragrance                               0.5%.
color                                     qs
kython  cg                          0.150%.
water                                     qs

thank you in advance
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Comments

  • Make some and find out. Kathon is a bit high, though. 0.10% is preferred.
    Robert Zonis, Sr. Formulation Chemist, Beaumont Products "All opinions and comments expressed are my own, have no relation to Beaumont Products, are fully copyrighted, and may not be used without written permission."
  • thx bob for the comment.
    i have seen that some hand sopas in market have YOGURT in their formula.
    any idea about such RM?


  • Tiny amount of surfactants...

    Special interests: anti-aging creams, gels, and serums; sulphate-free shampoos; and therapeutic cosmetics.
  • Stay far, far away from yogurt in personal care. Belassi makes a good point - Surfactants need to be 5-10x higher.
    Robert Zonis, Sr. Formulation Chemist, Beaumont Products "All opinions and comments expressed are my own, have no relation to Beaumont Products, are fully copyrighted, and may not be used without written permission."
  • edited December 2016
    what is the issue with yogurt ?
    is there any heath concern?
  • what is the issue with yogurt ?
    is there any heath concern?
    well, not as long as you stay awake.
    if you fall asleep, your head will be eaten by ants.
    Special interests: anti-aging creams, gels, and serums; sulphate-free shampoos; and therapeutic cosmetics.
  • actually I think that even with the proportions correctly adjust to say 20% minimum surfactant, this formulation will prove too harsh in the medium term. I would use SLES not SLS, the foam is better anyway, and I'd increase the amount of betaine. The cocamide MEA is fine and will give some foam stability and refattening effect. You might up that to 1%, not more as it will precipitate.
    Special interests: anti-aging creams, gels, and serums; sulphate-free shampoos; and therapeutic cosmetics.
  • Thank you belassi for funny comment :smile: 
    here is one a good example of hand soap with yogurt.
    http://www.milmil.com/en/products/83/liquid-soap-yogurt--peach.html
    actually is a good product witch I want to develop something more similar.

     




  • I very much doubt that yogurt is present in any useful amount and is there for marketing purposes only.

    Your formulation differs widely from the product shown in your link:

    • AQUA
      SODIUM LAURETH SULFATE
      SODIUM CHLORIDE
      COCAMIDE DEA
      COCAMIDOPROPYL BETAINE
      GLYCERIN
      PARFUM
      YOGURT
      COCO-GLUCOSIDE
      PROPYLENE GLYCOL
      TRIETHYLENE GLYCOL
      TETRASODIUM EDTA
      CITRIC ACID
      STYRENE\ACRYLATES COPOLYMER
      MAGNESIUM NITRATE*
      MAGNESIUM CHLORIDE*
      DMDM HYDANTOIN
      BENZYL ALCOHOL
      METHYLCHLOROISOTHIAZOLINONE*
      METHYLISOTHIAZOLINONE*
      CI 19140
      CI 14720
    I would definitely replace the Kathon CG (each of the items in the list which I have starred). I would also avoid DMDM Hydantoin (formaldehyde releaser).
  • You can purchase Yogurt Extract from www.formulatorsampleshop.com ... use 2% to 3% would be fine.  
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    Provides Formulation Development and Lab-Scale Contract Manufacturing Services.  See website for details www.desertinbloomcosmeticslab.com

  • Kathon CG is recommended 0.1% maximum so stick to that. You can buy yogurt but to eat and use surfactants in the formula as suggested by others here. 
  • my formula might be a starting formula that can modified to approach the Milmil product if possible.

    DMDM HYDANTOIN will not be used.
    i am wondering also about STYRENE\ACRYLATES COPOLYMER!
    is it use full in hand wash product?


  • Used as an opacifier.
  • Opulyn 301, will give you good opacity. Buttermilk is what you will have instead of yogurt
  • i will add TETRASODIUM EDTA about 0.1%
  • can we add COCO-GLUCOSIDE to formula above?
  • edited December 2016
    @nabil

    yes you can use Coco-Glucoside its non-ionic.  i like this better.....

    pure HOH                                86.3%
    sls                                            8%
    cocamidopropyl betaine            3%
    Coco-Glucoside                        1%
    glycerin                                     1%
    EDTA                                        0.1%
    fragrance                                 0.5%.
    kathon  cg                                0.1%.
    NaCl                                           qs
    Citric Acid                                  qs

    pH ~6.5

    took out the coco MEA to cut heating cost.  you can add it back in.  due to low surfactant level you might get around 2000cps tops?  but it'll work, and this is cheap!




  • chickenskin

    SLS has already been dicussed as a non-desirable ingredient.

    I continue to be uneasy about using Kathon CG. There are numerous antimicrobial presevatives available and I cannot understand why anyone should voluntarily use a substance which is a known contact allergen in any product.
  • edited December 2016
    thank you very much chickenskin
    that make things easier for me.

    but i think i can replace sls by sles as per recommendation of some experts.
    i will forget either about adding yogurt or buttermilk.

    jhonb , can you please advice about another preservative that would suitable for such product?

  • Gluconodeltalactone and Sodium Benzoate is accepted by ECOCERT as a preservative in certified organic cosmetics.

    A natural preservative that is a combination of a naturally occurring food additive glucono delta lactone, derived from corn, and a food grade preservative sodium benzoate, the sodium salt of benzoic acid, along with a trace amount of calcium gluconate as a processing agent.

    We recommend that you optimize (determine through interval testing the lowest effective dose) your preservative levels because all of the successful trials were done at use levels between 1.0% and 1.5%.

    The above is from http://www.ingredientstodiefor.com/item/Gluconolactone_Sodium_Benzoate_GSB_/565

    There are other commercial sources for this mixture.

    It is a suggestion only . I have not tested it myself but it does remove some of the question marks over thiazalone preservatives.



  • is it possible to add sodium benzoate only as preservative?
  • Yes but as with all new formulae, it will need testing for antimicrobial efficiency - and other things such as chemical and physical stability.

    A mix I used to use as a general purpose preservative was a mix of benzoic acid and phenoxyethanol.
  • I've been using sodium benzoate at 0.4% as a preservative for shampoos for years. Zero problems.
    Special interests: anti-aging creams, gels, and serums; sulphate-free shampoos; and therapeutic cosmetics.
  • here is an example that show sodium benzoate as preservative.
    http://www.beaute-test.com/sanex_zero_0__sanex.php

    sanex shampoo ZERO

  • The Sanex product also contains lactic acid so the active preservative may be benzoic acid.
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