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All Tech-transfer cleansers failing 50C
We’ve recently received tech transfers for a handful of cleansers: a liquid cleanser that pairs with a foamer, a gel cleanser, and a cleansing shave cream.
Each of their benchmarks have separated in 50C. Each product was formulated by a different lab. Is this normal? Do cleansers often have issues passing 50C?
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2 Replies
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50C may be high. We test at 40C, 65% RH (most products).
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50C is very high as @Microformulation (Mark) says, @MsCheddar. I’ve been told that 50C temp for accelerated stability arises from an ASTM method used in pharma and unfortunately adapted by personal care formulators. Mark is right, 40C is fine and I usually run at 43C / 65% RH, no higher.
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