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diazolidinyl urea vs formalin
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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10 Replies
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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?
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That’s what I understand. But I imagine there will be formula impact as well.
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Got it
Thanks
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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.
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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?
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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.
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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.
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Just as reactive but replaced in equilibrium from the releaser’s chemical reservoir.
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That is a good point.
Thanks
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