What it is
Methylchloroisothiazolinone belongs to a group of compounds called Isothiazolinones.
What it does
Methylchloroisothiazolinone is a preservative: it protects products from the growth of fungi, bacteria and yeast, thus prolonging their shelf life.
Methylchloroisothiazolinone is an irritant and a strong allergen. Because of that, it is mostly used, in small concentrations, in rinse-off products so the chances of it causing negative reactions are much smaller.
(Source: Contact Dermatitis, November 2011)
Take The Guesswork Out Of Skincare Shopping
Get access to the “Pro Skincare Library” for exclusive skincare routine “cheat sheets” and tricks to help you navigate the beauty aisles jungle like a pro and immediately know what to pick off the shelves to achieve the gorgeous skin of your dreams - even when you’re drowning in an endless sea of skincare products.