When formulation need to add edta. Edta a common ingredient found in skin and hair care products is an effective chelating agent binding to metal ions making emulsions more stable and allowing washes and soaps to develop that thick rich lather we love. Add naoh solution to adjust the ph to 80. The edta will slowly go into solution as the ph nears 80.
You may wish to switch from solid naoh to a solution toward the end for more precise control. But i agree with everything said thus far. If you use solid naoh pellets youll need 18 to 20 grams of naoh.
If your question was when to add it to a formula as in when in the batch process is it added we always added it as one of the first ingredients. Depends on your formulation. It is an aminopolycarboxylic acid and a colourless water soluble solid.
Edta chelation therapy alone and in combination with oral high dose multivitamins and minerals for coronary disease. The factorial group results of the trial to assess chelation therapy. Atbobzchemist one answer could be that they are trying to formulate natural and the easiest chelating agents to use edta are not allowed.
How much do you need to add. Edta also helps boost preservative effectiveness making it a standard choice for cosmetic formulators.
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