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Quaternium 15
Preservative effective against bacteria.
Raspberry
Stimulating and astringent.
While most beauty products won't include this ultra-common makeup, skin, and haircare preservative on the ingredient list, many will have a formaldehyde-releasing agent like imidazolidinyl urea or quaternium 15, which can be equally reactive.
 See also: Magnesium, Orange Peel, Milk, Cinnamic Acid, Benzophenone
  
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