Wow thank you i am gonna read this. I beigin to use citric acid but is that mean that edta can replace citric acid for the soap scum or i use both?Not only does it reduce soap scum in my sink, tub & shower, but I use it in combination with Rosemary Oleoresin Extract (ROE) to reduce the likelihood of rancidity (DOS - dreaded orange spots).
Here are a some links with usage rates for both:
The first 2 are really that same article, done as a scientific study by Chemistry professor, Kevin Dunn and his students:
and if you want to save this to your computer in pdf, click this link: http://cavemanchemistry.com/DreadedOrangeSpot-Dunn.pdf
More on chelators from @DeeAnna, the latter also including how to usage rates for EDTA & how to prepare it prior to use:
It would be good to hear your views on performance of Citric Acid and / or Sodium Gluconate as opposed to EDTA, lather /scum/ DOS etc. when you get around to giving them a go.As far as using 2 chelators together, there are soapers who do so. In fact, I am planning to give it a try myself at some point soon, perhaps in 2022. I plan to use EDTA + Sodium Gluconate together as a trial.
I have not used citrate or citric acid (to be converted to citrate), mostly because I had already purchased the EDTA and didn't want to do any more math calculations to correct the amount of NaOH needed in the soap formula. But I think the calculations were made easier by a member, galaxyMLP (see this link) but I still haven't tried it because I have so much EDTA on hand. I should try it someday, just so I have the experience, after all I do have citric acid (usually available where canning goods are sold here in the US) and do much canning these days.
I order EDTA but didnt receive yet. I plan to use both citric acid/EDTA cause i lost about hundred soap trying to find what was wrong and find out it was contaminant, from where??? Still dont know but i am not taking any chance still the citric acid seem to work well. Maybe also add roe to m'y oil when i will open it . Sodium gluconate seem to be expensive here so didnt try.I like to use Sodium Gluconate as a chelator, I do have Sodium Citrate and both are available online here in the UK as is Citric Acid, but with the first two you dont have to work out how much extra lye to use, its just add your percentage to the lye water and voila! works well as chelators Sodium Gluconate I feel is the better one IMHO. These will deal with soap scum but I dont think they will deal with DOS/ rancidity, that would need to be ROE I imagine, I have some but almost never use it so cannot advise any findings as to whether it really works or not.
Be careful about combining chelators, because they may interact in unexpected ways and you may not get the results you expect. Don't fall into the trap of assuming "if one is good, then more is better."...I plan to use both citric acid/EDTA...
Yes thats a good advice thank you i will try this!Be careful about combining chelators, because they may interact in unexpected ways and you may not get the results you expect. Don't fall into the trap of assuming "if one is good, then more is better."
Carolyn (cmzaha) uses EDTA and sodium gluconate with good results, but I don't know of anyone who uses a citrate and EDTA combination. I'm not saying it won't work, just that there's not a lot of background to know for sure this combination will be any more effective than one chelator alone.
Why not try one chelator -- EDTA alone works wonderfully in my experience -- and see how that works?