• Formulating

  Light sensitivity of formalin & DMDM hydantoin in shampoo with transparent package

  Posted by Abdullah on August 3, 2022 at 3:32 am

  Does light exposure reduce the efficacy of formalin or DMDM hydantoin in shampoo that has a transparent package and no UV absorber? 

  Abdullah replied 2 years, 11 months ago 2 Members · 7 Replies

  • dmdm-hydantoin
  • formalin
  • preservative
  • shampoo
• 7 Replies

• 

  OldPerry

  Professional Chemist / Formulator

  August 3, 2022 at 11:37 am

  I have not seen this in practice & have tested numerous shampoos/conditioners that are exactly as you describe 

• 

  Abdullah

  Entrepreneur

  August 3, 2022 at 12:31 pm

  @Perry that’s good. Have you tested shampoos with formalin too? 
  Was there any side effect from transparent package & no UV absorber in shampoo with formalin?

  I am using formalin and that may be more sensitive in everything than DMDM hydantoin i think. 

• 

  OldPerry

  Professional Chemist / Formulator

  August 3, 2022 at 12:31 pm

  I tested a few formulas using formalin but the vast majority were DMDM Hydantoin 

• 

  Abdullah

  Entrepreneur

  August 3, 2022 at 1:39 pm

  Had you seen any instability issue? 

• 

  Abdullah

  Entrepreneur

  August 3, 2022 at 1:39 pm

  @Perry

• 

  OldPerry

  Professional Chemist / Formulator

  August 3, 2022 at 3:15 pm

  No, not due to preservative breaking down anyway

• 

  Abdullah

  Entrepreneur

  August 3, 2022 at 3:25 pm

  Perry said:

  No, not due to preservative breaking down anyway

  Got it 
  Thanks a lot.

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