If i have silicones, alcohol and gas in my hair spray do i still need to test it for microbes?
Generally speaking, no - unless the ethanol is at a very low concentration, or unless you suspect that microorganisms are encapsulated in any of the ingredients.
To keep customers satisfied, ensure that you have microbiological analysis reports for the ingredients.
If, silicone and gases mixture used must have been treated to make free from living entities then I don't think there is need to go for any microbiological testing when prepared in alcohol at optimal concentration.
Agreed - but only for ethanolic products.
It might be worth finding out if there is a maximum ethanol concentration (if water is present, too) at which microorganisms will grow. Yeasts spring to mind.
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