• Formulating

  Zinc Oxide sunscreen

  Posted by amitvedakar on March 31, 2019 at 5:09 am

  My Formula as under

  Zinc oxide 10%

  Vitamin E 1%

  Cetosteryl Alcohol  8%

  CM 1000 2%

  EGMS. 6%

  Hard Paraffin wax 0.5%

  Light Liq. Paraffin  10%

  Silicon Oil  1%

  EDTA 0.1%

  Glycerin 5%

  Benzyl Alcohol  1%

  Carbomar 940 1%

  Cyclomethicone 1%

  Sodium Citrate 0.3%

  Citric acid

  Preservative

  EDTA

  Problem:

  1. Too thick

  2. Separate oil.

  3. Texture not silky.

   pH=7

  Please help to improve this formula. It is presented in tube so required thick

  with good sensory.  

  amitvedakar replied 5 years, 7 months ago 2 Members · 4 Replies
• 4 Replies

• 

  Fekher

  Member

  March 31, 2019 at 1:55 pm

  @Amitvedakar  
  for thickness problem may
  decreasing level of cetostearyl alcohol and carbomer solve the problem.
  For separation and slicky problem i guess it is emulsion’s problem so you should calculate you required hlb then use adequat emulsifiers.

• 

  amitvedakar

  Member

  April 1, 2019 at 10:55 am

  Thank you @Fekher. I cut down Cetosteryl Alcohol & Carbomer to 1/2 & Try. 
• 

  Fekher

  Member

  April 1, 2019 at 11:07 am

  @amitvedakar  waiting your success.

• 

  amitvedakar

  Member

  April 4, 2019 at 4:11 am

  I cut cetosteryl, HPwax, EGMS, Cm1000 to 50%. No change in carbomer 940.

  found result nearly as expected.

  The pH is 7 should i Add TEA for carbomer I added. will it form gel?

Log In to Reply