Comments

• Thanks Perry!

  in Find ingredient safety information here Comment by Biochemist June 2018
• Good point @SteveW but I just hate bacteria to have one up on me and my preservation strategy before I start ?

  in Natural preservatives Comment by Biochemist June 2018
• @Doreen same!! My other oils in formulation are slightly yellow coloured though so hopefully people won’t think the vit C has oxidised ?

  in Vitamin C serum (L-AA) and self tanner similarities Comment by Biochemist June 2018
• Thanks @Doreen I’m about to start using ascorbyl tetraisopalmitate so glad this seems to be ok wrt oxidation

  in Vitamin C serum (L-AA) and self tanner similarities Comment by Biochemist June 2018
• Please keep us posted what your rep says, I also like using dermofeel PA-3 @Microformulation

  in Natural preservatives Comment by Biochemist June 2018
• Thanks @Perry that’s also been my experience thus far.

  in Info sources Comment by Biochemist June 2018
• ?exactly @belassi it amazes me how putting a simple blend of vegetable oils on your skin is suddenly an amazing anti ageing serum that is full of claims about smoothing wrinkles, promoting collagen synthesis (the list goes on). That’s why I’d like a…

  in Info sources Comment by Biochemist June 2018
• Wow @Bill_Toge! Thanks 

  in Formulating with Acids: pKa and pH Comment by Biochemist April 2018
• I’m still a novice but really like Emulgade PL68/50. Olive M 1000 is also great... except for the soaping. Mark Broussard has some good tips on reducing this.

  in Your favorite moisturizer moisturizing emulsifier? Comment by Biochemist March 2018
• Thanks so much @Bobzchemist and @chemnc! Those are both so different so I’ll see what I can get my hands on.

  in Mixing blades for small scale use Comment by Biochemist February 2018
• Thanks @MarkBroussard -I’m using Emulgade PL68/50 (cetearyl alcohol & cetearyl glucoside) as non-ionic blend so do you think HLB could still be an issue here?  (Also have an anionic in the combination and glyceryl stearate). Oils at 15- 15.5% so…

  in DL Panthenol causing instability? Comment by Biochemist December 2017
• Thanks @perry I’ll give it a go

  in DL Panthenol causing instability? Comment by Biochemist December 2017
• Thanks so much @Belassi and @Doreen81. Looks like I might need to do some research into better equipment for home use!

  in DL Panthenol causing instability? Comment by Biochemist December 2017
• Great, thanks @Perry. I’ll work on process then. It’s a body cream -What levels of DL Panthenol would you recommend if mine is a little high? Thanks!

  in DL Panthenol causing instability? Comment by Biochemist December 2017
• Thanks @Bill_Toge- in the case where you have a stable product but the preservative efficacy fails, do you change the preservative and repeat stability testing again, or are you fairly confident you have a stable product so only repeat PET? (Assumin…

  in Stability testing timeframes Comment by Biochemist November 2017
• @em88 for the products that you mention you know probably won’t be stable at higher temperatures, do you only do room temp testing and specify on storage conditions not to exceed that temp? 

  in Stability testing timeframes Comment by Biochemist November 2017
• Thanks, appreciate the tips!

  in Stability testing timeframes Comment by Biochemist November 2017
• Thanks both for the advice, makes perfect sense. when do you suggest running preservative efficacy testing in relation to stability testing- concurrently or make sure the product is stable then test preservatives or vice versa? I need the most cost …

  in Stability testing timeframes Comment by Biochemist November 2017