diazolidinyl urea vs formalin

Tagged: formaldehyde, preservative

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diazolidinyl urea vs formalin

Posted by Abdullah on June 12, 2023 at 12:23 am

1. What percentage of diazolidinyl urea would have the same anti bacterial effect as 75ppm formaldehyde from formalin, specially against Staphylococcus aureus? <div>

2. How much formaldehyde will be released in a product from 0.1% diazolidinyl urea?

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Abdullah replied 10 months, 3 weeks ago 2 Members · 10 Replies
- formaldehyde
- preservative
10 Replies

PhilGeis

Member
June 12, 2023 at 8:37 am

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8552461/

try Table 4
- Abdullah
  
  Member
  June 12, 2023 at 10:01 pm
  
  Thanks
  
  To make sure i have understood it correctly, does the chart mean that with 0.49%, 0.3%, 0.46% DU, 0.02%, 0.02% & 0.06% formaldehyde was released?
  - PhilGeis
    
    Member
    June 13, 2023 at 5:36 am
    
    That’s what I understand. But I imagine there will be formula impact as well.
    - Abdullah
      
      Member
      June 13, 2023 at 7:06 am
      
      Got it
      
      Thanks
PhilGeis

Member
June 13, 2023 at 8:30 am

This refers to free not total formaldehyde (FA). In my experience, FA releasers at 2000-3000 ppm offer ongoing free FA at 100-200 ppm. Some like DMDM Hydantoin offer more at initially.
- Abdullah
  
  Member
  June 13, 2023 at 8:42 am
  
  Got it
  
  As i am using formalin which is 37% formaldehyde, i wanted to know how it compares to these releasers.
  
  For example instead of 500ppm DU i want to use 100ppm formalin to get about the same amount of free formaldehyde for gram+ bacteria. Is this a good idea?
  - PhilGeis
    
    Member
    June 13, 2023 at 8:55 am
    On paper but FA is very reactive. That’s why FA-releasers were developed - to provide a constant level. Simply adding FA to 100 ppm will not sustain 100 ppm.
    
    This reply was modified 10 months, 3 weeks ago by PhilGeis.
    - Abdullah
      
      Member
      June 13, 2023 at 10:34 am
      
      Isn’t the free formaldehyde from releasers as much reactive as from formalin in the same product, package and condition?
      
      If not why not? Both are free formaldehyde.
      
      Those parts that are not free will not be reactive but they don’t do any preservation too.
PhilGeis

Member
June 13, 2023 at 10:43 am

Just as reactive but replaced in equilibrium from the releaser’s chemical reservoir.
- Abdullah
  
  Member
  June 13, 2023 at 10:45 am
  
  That is a good point.
  
  Thanks