Comments

• @PhilGeis yes, I always try to add EDTA 0.2% on my formulation. Although it acts as chelating agent, but it is said it can help boost the preservative effect. But sometimes I don't use it where cation surfactant is in my formula. Thanks for your ins…

  in About preservative selection Comment by vhogiono January 2021
• @crisbaysauli Thank you so much! I'm glad there are people out there have tried using DMDM Hydantoin for leave-on products and its works just fine. Now, I can be more confident in using this preservative for my leave-on product. :)

  in About preservative selection Comment by vhogiono January 2021
• @PhilGeis  thanks for your insight. What do you mean DMDM Hydantoin is high? (Do you mean my input at 0.6% is too high?). I agree, my combination of DMDM Hydantoin and Potassium sorbate should work, but I just wonder whether it is safe enough to be…

  in About preservative selection Comment by vhogiono January 2021
• @Abdullah Thank you!, yes I tried to make the cetearyl alcohol into 2% only and remove shea butter. It feels less thick.  Now I'm doing the freeze-thaw cycle for stability testing. Usually on cycle 2-3 the water always separates. Hope this time it …

  in Conditioner too thick problem Comment by vhogiono January 2021
• @Benz3ne thank you. Mine is Natrosol HBR 250. I have tried to remove this completely but still it is too thick. @crillz according theory, behentrimonium chloride is cationic which mean it can irritate quite easily. and cetearyl alcohol suppose to c…

  in Conditioner too thick problem Comment by vhogiono January 2021
• Hi @Andraous . Thanks for your insight. I did right away trying what you suggest which is using other carbomer. I tried Carbopol Ultrez 20, with same formula and input rate. However it turns out to form microfoam even more. It is even more unpleasa…

  in microfoam on hand sanitizer Comment by vhogiono January 2021
• Thank you for your guidance :)

  in Surfactant turning pink problem Comment by vhogiono December 2020
• Thank you Perry and Belassi for your advise and the time to read my post. I'm also suspecting the Fragrance oil. Until today I have no idea that FO can possibly turns the surfactant color into pink. The one that turns really pink is somewhat like ci…

  in Surfactant turning pink problem Comment by vhogiono December 2020
• Hi everyone. I'm Vincent, and thank you for letting me join the forum. I just graduated from formulation chemist diploma, and hope to get more and hopefully can share some good information to all of you.

  in Welcome to the forum Comment by vhogiono December 2020