Home Cosmetic Science Talk Formulating Why is this formulation keep turning light brown?

  • Why is this formulation keep turning light brown?

    Posted by Lee32 on January 28, 2015 at 10:54 pm

    Hello all,

    I am trying to make a vitamin C skin cream, but it keeps turning light brown, even after increasing Glycol Stearate SE, to 4% of the formula.          

     (A) Cetearyl Alcohol                        1.5%      g .5

    (A) Cetyl Alcohol                              1.5%      g .5

    (A)Vitamin C Ester                           1%          g .3

    (A)Ceteareth-20                             2.5%       g .75

    (A)Stearyl
    Palmitate
                           4%          g 1.2

    (A)Glycol stearate                           2%          g .6

    (A) Jojoba                                           1%          g .3        

    (A) Vitamin E                                      1%          g .3

    (A) Squalane                                      3.5%      g 1.0

    (A) Glyeryl Stearate   1.5%      g .45

    (B) Water                                            76.4%    g 23

    (B) Sodium PCA                                1%          g .3

    (B glycol                                            1%          g
    .3

    (B)Glycerin                                         .7%         g .2

    (C) Water                                                           

    (C)Vitamin C Magnesium              .6%         g
    .2RD

    (C)Witch Hazel                              .6%         g .2

    (C) Phenoxythenol                          .65%      g .2RD

    (C)
    Honeysuckle                           .35%       g .1
            

     (D) Dimethicone                          3%          g 1

    Lee32 replied 9 years, 11 months ago 2 Members · 2 Replies
  • 2 Replies
  • crisbaysauli

    Member
    January 29, 2015 at 8:03 am

    Vitamin C ester and Vitamin C Magnesium might be causing this, since you are using quite high dosages. I had a similar experience where 0.001% Sodium Ascorbyl phosphate made my lotion yellow in just 1 week at 45 degrees. No idea how to stabilize this… It might be good to source for an encapsulated Vitamin C.

  • Lee32

    Member
    January 29, 2015 at 8:07 pm

    Thank you Crisbaysauli, I didn’t think of that.  I thought it might be the Honeysuckle or the Stearyl
    Palmitate.  
     

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