---
type: "WebPage"
title: "Analysis of isothiazolinones in your cosmetic products"
description: "You need to analyse isothiazolinones in your cosmetic products First of all, isothiazolinone is a family of biocides composed from a heterocycle, 1,2-thiazol-3-one. Isothiazolinones are used against bacteria and fungi in lacquers, paints, antifoulings and varnishes. Their biocidal effect comes..."
resource: "https://filab.fr/en/sectors-of-activity/laboratory-analysis-cosmetics/analysis-of-isothiazolinones-in-your-cosmetic-products/"
tags: ["EN", "pll_62f65de22855c", "Anaïs DECAUX"]
timestamp: "2026-01-09T13:37:54Z"
published: "2023-03-24T08:39:00Z"
language: "en"
author: "bwa"
---

# Analysis of isothiazolinones in your cosmetic products

## You need to analyse isothiazolinones in your cosmetic products

First of all, isothiazolinone is a family of [biocides](https://filab.fr/en/our-services/our-analysis-services/chemical-analysis-laboratory/analysis-and-determination-of-biocidal-agents-in-the-laboratory.md) composed from a heterocycle, 1,2-thiazol-3-one. Isothiazolinones are used against bacteria and fungi in lacquers, paints, antifoulings and varnishes. Their biocidal effect comes from a two-step mechanism: a rapid inhibition of growth and respiration, followed by irreversible damage to the cell within hours. By reacting with the cell’s proteins, oxygen consumption, hence respiration, and ATP synthesis, hence energy production, are inhibited.

Isothiazolinone is a preservative used in cosmetic products such as shampoos and hair care products. It is permitted in Europe for all cosmetic applications, but at a maximum concentration of 15 ppm.

Therefore, the support of a [laboratory competent in the analysis of preservatives in cosmetics](https://filab.fr/en/sectors-of-activity/laboratory-analysis-cosmetics/laboratory-analysis-preservatives-cosmetic.md) is essential to be able to perform the analysis of isothiazolinone in your cosmetic products.

## FILAB meets your needs for the analysis of isothiazolinones in your cosmetic products

Through our three levels of services: analysis, expertise and R&D support, FILAB assists cosmetics companies with their needs for isothiazolinone analysis in their cosmetic products.

To this end, the FILAB laboratory provides its clients with the know-how and experience of its team, as well as a 5200m² analytical facility equipped with state-of-the-art equipment.

 [Request a quote](https://filab.fr/en/contact-form.md)
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