[sri]

@ketchito Thanks for your suggestion. Also I noticed some black particles inside today. So as you suggested previously mostly this might be because this is not preserved. So I decided to repeat this once by adding preservative and an acid to reduce PH to 4 and will update here. Thanks a lot for your help in this regard.

[sri]

Thanks a lot for your response. I used only water and GHPTC (0.4%) and there are no other ingredients. I’m just trying to check how stable this solution is over a period of time before adding surfactants. I want to ensure to use only stable solution to eliminate the shampoo becoming unstable because of GHPTC. I’m not sure if this is right approach to test or better approach would be to first prepare final product and then figure out if there are any issues.

I didn’t create the final product yet. I didn’t add any preservative. Other than the contamination issue, is there a possibility that slurry will separate if left unused versus using it the same day it is prepared?  Also will temperature will have any impact? Temperatures here dropped down to unusually low temperatures from 4-5 days. So just want to understand if that also can be a factor. If required, I will create slurry again and will add preservative to check if that is causing this separation.

Pls suggest. Thanks a lot.