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GMS 40% vs 90% mono stearte
In general, in LGN emulsions which one do you prefer to use as co emulsifier and why?
GMS with 40% mono stearte or 90%.I saw in a post from ulprospector that said 90% mono makes LGN better than cetearyl alcohol but in a book i saw that 40% mono is better and 90% mono is rarely used in cosmetics.
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4 Replies
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90% C18 stearate is rarely used, that’s used as an intermediate in synthesis or in pharma. You are fine using the 40/60 stuff. I’ll also add that the classic builder for LGN emulsions is cetearyl alcohol with glyceryl stearate at ratio about 3:1for best results. I personally find using just plain cetyl alcohol with GMS works fine 95% of the time.
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chemicalmatt said:90% C18 stearate is rarely used, that’s used as an intermediate in synthesis or in pharma. You are fine using the 40/60 stuff. I’ll also add that the classic builder for LGN emulsions is cetearyl alcohol with glyceryl stearate at ratio about 3:1for best results. I personally find using just plain cetyl alcohol with GMS works fine 95% of the time.
Can i ask what is the reason that 90% C18 stearate is rarely used in cosmetics?
Price or performance? -
Price and availability. The 90% stock is mainly for excipient in pharma,intermediate in specialty synthesis and is far more refined and expensive. Plus the C16/C18 works just fine. The exception is when used in stearyl alcohol/cyclomethicone antiperspirant stick systems. It is referred to as “Deodorant Grade” then when ordering.
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chemicalmatt said:Price and availability. The 90% stock is mainly for excipient in pharma,intermediate in specialty synthesis and is far more refined and expensive. Plus the C16/C18 works just fine. The exception is when used in stearyl alcohol/cyclomethicone antiperspirant stick systems. It is referred to as “Deodorant Grade” then when ordering.
A supplier is offering both 40% and 90% mono at the same price. Which one do you suggest should i purchase?
40% or 90% mono?I am using it with cetearyl alcohol+SLS+ xanthan gum in lotions.