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Chelating Agent Recommendation
Hey everyone,
I hope you all are well and in great spirits. I am looking for chelating agent usage rate recommendation for a hair conditioner formula. I know Disodium EDTA is the standard, but was curious regarding usage rate as I was under the impression that it cannot be used in cationic environments. Is GDLA an option if I cannot use EDTA? Thank you in advance.
Phase A:
Water-qs
Sodium Benzoate-0.3%
cationic guar- 0.15%
Phase B:
Btms-50- 2%
cetearyl alcohol 30/70- 5%
Phase C:
Euxyl pe 9010- 1%
Hydrolyzed rice protein 3%
Fragrance- 0.3%
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2 Replies
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I think EDTA and GLDA have the same number of negative charges, unlike something like sodium phytate. I guess the concern would be precipitants…and if they form, which can be verified with testing.
The way I understood chelates and cationics from my mentor was….use the ones with the fewest negative charges…and use them at very very low rates.
Here is a snippet from him…when we were hashing through a formula with Varisoft Eq:
Phytic acid has up to 12 negative charges which is three times that of TSGD or EDTA. It’s a cationics nightmare. The others may actually work because they’re added in traces compared to the cationic ingredient. From a chemistry perspective, it’s unlikely that a TSGD-Varisoft complex forms which precipitates. Most likely, there will be electrostatic interactions between the two but nothing which you could feel or see, just the kind which potentially reduces long-term stability.
He leaned towards using GLDA at ultra low rates.
Good luck.
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Roger that! Thank you.
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