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Can the same emulsifiers differ depending on the supplier?
Looking at
1) PEG-100 Stearate & Glyceral Stearate
2) Steareth-21Can these emulsifiers vary from brand to brand?
I recently got a shipment from a new supplier (the old one went out of business). With the old emulsifiers, the viscosity on my past patches had been slightly low so I had reduced the water ratio by 2% which seemed to work well. But somewhere since switching to the new company’s emulsifiers, in latest batches I had to go to 101.6% of what the water in the old thinner batches use to be in and it still is thicker than it should be. The top has a firm layer where the normal product is soft to the touch.
I measure to 1/10th of a gram and am perplexed as to what is causing this hardening in the product.
Has anyone ever experienced emulsifiers providing different consistency based on the supplier?
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1 Reply
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Yes, raw materials will differ from company to company. They don’t make the ingredients the same way so you might get different compositions.
See this article I wrote on the subject.
https://chemistscorner.com/why-cosmetic-ingredients-with-the-same-name-arent-always-the-same/Why cosmetic ingredients with the same name aren’t always the same
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