Hydrogen peroxide stability

i tried to make a bleach for a skin but I didn’t make it stable with hydrogen peroxide. How can i do this. ??? Plz suggest 

Comments

  • PerryPerry Administrator, Professional Chemist
    What was your whole formula?
  • PharmaPharma Member, Pharmacist
    Are you saying that you're trying to mix bleach with hydrogen peroxide or that you want to make a skin bleaching solution containing hydrogen peroxide?
    Depending on the furnisher, hydrogen peroxide is sold with a small addition of stabiliser (usually not enough to be put on the label but sometimes enough to show up in the MSDS). A common base for cosmetic/pharmaceutical use is phosphoric acid which may or may not be complemented with other ingredients for increased stability or corrosion inhibition (like nitrates), other stabilisers are stannates, pyrophosphates, organophosphates, or colloidal silicate. Pure (i.e. non-stabilised) hydrogen peroxide solutions are very unstable and may decay within hours even in the fridge. Stabilised ones remain stable for years at room temperature given certain conditions (meaning, it depends with what you mix them and under exclusion of light).
    Iron salts/ions are your worst enemy followed by oxidisable organic matter, mix hydrogen peroxide with these and you've lost the game. The main effects of above mentioned stabilisers are pH control and iron sequestration.
    For more help. do what @Perry proposed, share your formula.
  • Hi perry here is my formula 
    yes its a skin bleaching cream
     
    cetyl alcohol - 6
    emulsify wax-4
    stearic acid -4
    Acetenalide - 0.05
    citric acid- 0.05
    hydrogen peroxide - 5 
    Water - qs
    termuric oil -0.5
  • PharmaPharma Member, Pharmacist
    What is the INCI name of your emulsifying wax? There are several different ones ;) . If it's the one containing boric acid, then this might be the source of hydrogen peroxide decomposition. Regarding stability; how do you know that it's not stable? Does your container bloat?
    Turmeric oil (mostly curcumin, I suppose) may not be stable and could be another reason why. Don't mix any plant extracts with your cream.
    The rest should be fine, since all you have left in there is A) stable against H2O2 or B) is a stabiliser for H2O2.
    I don't know if 0.05% citric acid suffices. Did you check pH?
  • Bill_TogeBill_Toge Member, Professional Chemist
    your pH needs to be below 4, and you need a chelator plus a stabiliser e.g. sodium stannate, or etidronic acid
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
  • PharmaPharma Member, Pharmacist
    It doesn't necessarily have to be below 4 but it might help. Also, you have a stabiliser (acetanilide) and you have a chelator (citric acid). I certainly wouldn't use a stannate in a skincare product though exchanging citric for etidronic acid might be an option. Some patents propose the use of phytic acid though I couldn't find any useful scientific literature in this regard. TBH, I don't know if acetanilide is fine in a skincare product either... there are products such as Refectocil which only use citric acid at a slightly acidic pH and that cream is stable for several months.
  • Thanks all of u for ur reply. Pharma its bloating after 1 hour or less time. I will try ur suggested ingredients nd will tell u what the results. 
  • Bill_TogeBill_Toge Member, Professional Chemist
    forgot to mention, you also need to use deionised water to make the product - preferably 5 µS/cm or less, as traces of metal salts in water can very easily decompose peroxide
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
  • I'm not going to give advice because the idea is so bad. Skin bleaching, to begin with, is a stupid idea, check out what Fela had to say about it in his album Yellow Fever
    Second:
    For bleaching skin, an older study reported that you need a concentration of between 20 and 30 percent. This is much higher than the 3 percent that’s considered safe for home use. The risks of burns and scars are far greater than any potential skin lightening effects.
    Third, there is a high risk of accidentally creating high explosive substances.
    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.
  • MarkBroussardMarkBroussard Member, Professional Chemist
    @9879088909:

    First of all ... what Hydrogen Peroxide are you using?  Is it a 50% solution or a 35% solution.  If you are using 5% of a 50% Hydrogen Peroxide, your effective load of HP is 2.5%.  That's less than what you buy at the supermarket which is typically a 3% HP load.  So, you'd be better off just going to a drug store, buying a bottle of HP and pouring it on your skin.
    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

  • Bill_TogeBill_Toge Member, Professional Chemist
    @Belassi in his time they were using mercuric chloride!
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
Sign In or Register to comment.