Methyl Chloro Isothiazolinone and Methyl Isothiazolinone (CIT/MIT) Analysis

Methyl chloro isothiazolinone (MCI) is a preservative that is active against bacteria, yeast and fungi and is generally used in the manufacture of water-based cosmetics and personal care products. It is also used in products such as paper coatings, detergents, paints, adhesives and cutting oils.

But this chemical compound is considered a standard chemical allergen. In high concentrations, methyl chloro isothiazolinone causes chemical burns and irritates the skin. In recent years this compound has been increasingly removed from cosmetic products and is now used in lower concentrations in rinses.

Methyl isothiazolinone (MI) is a preservative chemical compound commonly used in personal hygiene products such as shampoos, lotions, emulsions, and sunscreens, and in industrial cooling oils, cutting oils, and paper polishes. It is also commonly added to household cleaners instead of formaldehyde. This substance is a component of kathon and grotan preservatives.

Methyl isothiazolinone is also used in air fresheners and can be the preservative component of a product. Specifically, this compound is found in cleaners such as liquid dish soap, liquid laundry soap, all-purpose spray cleaners, and window cleaning solutions. This substance is also found in products labeled as natural. It is often used as a preservative in cleansing products that claim to be green.

Methyl chloro isothiazolinone (MCI) is an effective preservative, especially when paired with methyl isothiazolinone (MI). However, in high concentrations it is irritating to the skin and can even cause chemical burns. For this reason, many countries, including the USA, have restricted MCI/MI concentration levels in products.

CIT is the nickname given to the molecule 5-chloro-2-methyl-4-isothiazolin-3-one. It is also a preservative with antibacterial and antifungal effects, belonging to the group of isothiazolinones. These compounds contain an active sulfur, which can oxidize thiol-containing residues, which defeats most aerobic and anaerobic bacteria.

MIT refers to the methyl isothiazolinone molecule. This powerful biocide and preservative belongs to the isothiazolinone group. It has been used in many care products and some paints in recent years. It is also used as a fertilizer and plant protection product.

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