Preservatives in Colors

Hello, we are a new Pigment manufacturer based in USA. All our products are FDA batch certified. We wanted to know if we should/could add Preservatives in our Colorants to increase the shelf life? 


  • PhilGeisPhilGeis Member, Professional formulator
    edited August 2
    If in aqueous solution - you'll need microbiological preservatives.  I'm not aware preservatives are added to powder colorants - assume they'd be identified in relevant CFR section.
  • That's true, I can't find anywhere in CFR regarding adding preservatives for powder colorants since the customers can add the preservative during formulating however as the industry is moving towards increase shelf life, powder with amount of moisture/humidity in Florida is going to support growth to Microbiological bacteria. We can furnace it at 110/120 which kills most bacteria but it also impact the color value. 
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