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Toner pH 3.6 - preservative choice
Hello all,
I would like to use Verstatil® TBG MB (Triethyl Citrate, Glyceryl Caprylate, Benzoic Acid) solubilised to preserve a toner with a pH of 3.6. The paperwork says this preservative is for pH 4-6. My guess is that the benzoic acid become too much in a free state in low pH and can become too irritanting or precipitate.
However, then looking at a different manufacturer- SENSICARE C 2090 (Triethyl Citrate, Caprylyl Glycol, Benzoic Acid) their TDS says “the product is stable throughout a broad range of pH (from 2 to 12) .”
These are clearly different ingredients, but both have benzoic acid. So I wonder why sensicare is stable at as low as 2pH.
I cannot get Sensicare, and I can only get Verstatile. Is there anything I missed, because at the moment I think as long as the acid doesn’t precipitate I should be fine using it at 3.6. My other concern then is the irritation potential.
I would greatly appreciate any advice on Verstatil (Triethyl Citrate, Glyceryl Caprylate, Benzoic Acid) in 3.6 pH.
Thank you.
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This discussion was modified 1 day, 9 hours ago by
ost85. Reason: formatting
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This discussion was modified 1 day, 9 hours ago by
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3 Replies
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Neither is that great - Verastatil the the weakest - its pH range is prob driven by concerns for pH driven hydrolysis of its fairly-useless ester.
the 2-12 is absolute BS and should eliminate your consideration of that supplier.
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This reply was modified 14 hours, 37 minutes ago by PhilGeis.
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Thanks, that wide pH range did seem very suspicious.
The other two I have are:
1. sodium benzoate + potassium sorbate, which I like generally, but they too seem not ideal for 3.6pH.
2. phenoxyethanol + ethylhexylglycerin which is my fallback option.
Do you have any suggestions for any others I should consider?
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This reply was modified 14 hours, 37 minutes ago by
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I know some have found sorbic/benzoate good but it’s generally weak vs Gram negatives. Phenoxy+ is good v Gram negatives but weak vs Gram + and fungi. Ypu best off with a combination of the 2 - esp. benzoate and phenoxy+
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