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Industrial vs cosmetic grade CMI MI
A supplier said we have industrial grade CMI MI.
1. Is there any difference between cosmetics grade and industrial grade CMI MI?
2. Can we use industrial grade CMI MI in cosmetics?
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5 Replies
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I would not. Too much unknown.
Industrial preservatives are classified as pesticides in some countries (e.g. US) and some countries specifically ban the use of pesticides in cosmetics (e.g. Canada).
For some suppliers - these are the same a stuff - just labeled differently. For others, the stuff intended for industrial market is less controlled, more impurities, byproducts..
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They say it has 14% CMI MI active at 3:1 ratio and also 0.009% DCMIT.
Is this spec ok for cosmetic use?
I would use only 3ppm active CMI MI in final product.
Also, as this 14% active is very concentrated, i want to make a blend if 10% SLES and 10% of this preservative to make it 1.4% active and then store it and use it for smaller batches or sample making. Is this method correct?
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I would not.
What is DCMIT? What else is in it? Some salt for stability?
At 14%, the volume added is so small, you’ll have trouble getting it sell mixed. For a premix, you should prob ensure it’s stable.
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It is 4,5-Dichloro-2-methyl-4-isothiazolin-3-one.
It also has
Mg chloride 4-8%
Mg nitrate 14-18%
For premix, isn’t isothiazolinones stable at 10% surfactant solution?
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What do you know of DCMIT safety?
I don’t know stability - what surfactant?. Challenge test so final product application should give you some assurance and that must be repeated tough the period of premix use.
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