CP/HP Citric Acid Calculator

[aihrat]

Hello! I use citric acid in my soap recipes for chelation, DOS prevention, and better lather. I'm a bit tired of recalculating my citric acid and extra lye usage amounts each time I make a batch, so I made a pretty basic spreadsheet to do it for me:

https://docs.google.com/spreadsheets/d/1CKUdAFW96B_EY_zYxib4JQGwAeIbRNUUyNQmy4tA5wY/edit?usp=sharing

Please feel free to copy the document for your own customisation and use. If you've never added citric acid to your soap before, please read this link before using the calculator to understand how it works and prevent failed batches.

A note regarding the calculations on the masterbatched CA/NaOH Citrate solution is that I am most definitely not a chemist, and do not understand the changes that the CA and NaOH go through when reacting with each other. In particular, I cannot tell you the resultant sodium citrate concentration in the solution, nor do I know the precise ratio of disodium citrate to trisodium citrate in the solution. I also cannot predict how much water is lost for every masterbatch. All I know is that I usually mix the two solutions together, let it cool, and add it to my soap batter, so a masterbatched solution would save me a lot of time.

Many many thanks to DeeAnna for her citric acid tutorial, which forms the basis for the ratios of CA/NaOH the calculator uses: https://classicbells.com/soap/citricAcid.html

 

[heart_gonzales]

Hi there. I want to use your spreadsheets, I opened it but, it needs your authorization so I can use it. I can only view the file, but can't use it. Thank you! Google asked me to send you a request so I can use it.

 

[Mobjack Bay]

The SoapMakingFriend calculator will do the NaOH correction for you when you add citric acid to the recipe from the additive list.

 

[DeeAnna]

This thread is several years old and Aihrat is no longer a member here.

You would be better off to use the Soapmaking Friend calc -- https://www.soapmakingfriend.com/soap-making-recipe-builder-lye-calculator/