Acid value drift - Cosmetic Science Talk

Acid value drift

Have you ever had a problem with the acid value of a raw material increasing over time?  Specifically materials like EGMS, EGDS, or PEG-100 Stearate?

What would be the cause and how might it be prevented? 

Comments

  • Reverse acid esterification perhaps?. Are they all from the same brand?. 
  • I believe they all come from the same supplier.
  • sounds like ester hydrolysis - how much is the acid value increasing by?
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
  • Reportedly, it's going over acid value = 9


  • You should contact the factory, maybe a bad esterification ruined all the derivatives.  It's all Hallstar?. You could contact R&D, with the batch number they must have a counter sample to at least, tell you why is happening and how to fix it. 
  • it could also be the result of contamination
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
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