• Formulating

  All Tech-transfer cleansers failing 50C

  Posted by MsCheddar on February 2, 2022 at 3:34 pm

  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?

  chemicalmatt replied 2 years, 9 months ago 3 Members · 2 Replies

  • cleanser-stability
• 2 Replies

• 

  Microformulation

  Member

  February 2, 2022 at 6:10 pm

  50C may be high. We test at 40C, 65% RH (most products).

• 

  chemicalmatt

  Member

  February 9, 2022 at 9:58 pm

  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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