Preservative

Triclosan

INCI: TRICLOSAN

Reviewed by Kate · Last updated 14 Aug 2026

A synthetic purifying agent used to preserve formulations and reduce odour-causing bacteria

Best For Skin Types

All, Oily

Addresses

Oil control

Effective Concentrations

Up to 1%

Usage Frequency

Daily

What Is Triclosan?

Triclosan is a synthetic antimicrobial compound that functions as both a preservative and deodorant agent in skincare formulations. It works by inhibiting bacterial growth, which helps extend product shelf life and reduce the formation of odour-causing bacteria on the skin's surface.

The ingredient has been used in cosmetics and personal care products for several decades. It is typically incorporated at low concentrations (usually under 1%) to achieve its preservative and antimicrobial effects.

How It Works

Triclosan works by disrupting bacterial cell membranes and interfering with microbial metabolism, which inhibits bacterial growth and reproduction. This dual action makes it effective as both a preservative (protecting the product itself) and a deodorant (reducing odour-forming bacteria on the skin).

When applied topically, it remains largely on the skin's surface rather than penetrating deeply, which limits its action to the immediate environment where odour-causing microorganisms thrive.

Clinical Evidence & References

Triclosan has a long history of use in personal care products and is generally recognised as effective for antimicrobial and preservative purposes. Studies demonstrate its efficacy in reducing bacterial counts on the skin and extending product stability.

However, concerns have emerged regarding its potential environmental impact, particularly its persistence in aquatic ecosystems and effects on non-target organisms. Some regulatory bodies have restricted or phased out its use in certain product categories due to these environmental considerations rather than proven safety issues in skincare use itself.

How to Use

Triclosan is typically found as a component in finished products rather than something used as a standalone ingredient. When selecting products containing it, standard application according to product instructions is sufficient. If using multiple antimicrobial products simultaneously, there is no additional benefit to combining them — one well-formulated product is adequate for maintaining skin hygiene.

Safety & Precautions

Triclosan is generally well-tolerated at the concentrations used in cosmetics and is not considered a skin irritant for most people. Some individuals with sensitive skin may experience mild irritation, though this is uncommon at standard usage levels.

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