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Guessing preservative/s
So to move any further with my own goals I want to be able to look at a list of ingredients of basic skin and/or hair product and understand basic components in it and to some extent process of how they were made. Just basics (as I do not have even those). So I selected few products that I used to purchase regularly and looked into each ingredient, recommendations of use, etc. With some of those ingredients I already ‘played’, with some not. The most difficult I find figuring out preservatives and understanding of what type preservative is sufficient for each product. So for example, I have two different brands of skin care gel, I understand all other ingredients on their lists of ingredients as well as purpose of using them in formulation.
First brand has alsoMagnesium ChlorideMagnesium NitrateCitric AcidMethylchloroisothiazolinoneMethylisothiazolinonePotassium SorbateSodium BenzoateAll of them used below 0.1%. I doubt each of those added separately, my guess they all are part of one or two preservatives (please correct me if I am wrong)Second brand for same product instead hasPhenoxyethanolEthylhexylglycerinDisodium EDTAEach below 1%I looked briefly into each of those ingredients (caused more question than answers to be honest)So the questions I have:Is properties (purpose to use) of ingredients on first list matching properties (purpose to use) of ingredients on second list?What would be your choice of preservative/s in skin care gel?Is ingredients on both lists used individually or they are by themselves sub-ingredients of particular ingredient?Any advice, directions, information will be very much appreciated. -
2 Replies
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Methylchloroisothiazolinone, Methylisothiazolinone, Magnesium Chloride and Magnesium Nitrate are part of one preservative. This product is sold under various trade names but is commonly known as Kathon CG.
Kathon CG is usually on used in rinse off products such as shampoos, conditioners and body washes.
Phenoxyethanol and Ethylhexylglycerin are part of a preservative sold under the trade name Euxyl PE9010.
http://microsites.schuelke.com/wet-wipe-preservation/leaflets/euxyl-PE-9010-englisch.pdf
Citric acid is usually only used pH adjustment of a product and is not a preservative.
Disodium EDTA is usually added to boost preservative efficacy by complexing any metal ions in the sample that can interfere with preservative function.
Hope this helps.
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Thank you so much
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