Light sensitivity of formalin & DMDM hydantoin in shampoo with transparent package - Formulating - Chemists Corner

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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 10 months, 1 week ago 2 Members · 7 Replies
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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