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Biocides
Biocides

WHAT ARE THEY?

These are chemical substances characterized by their anti-bacterial and anti-fungicidal properties (microbial reproduction is inhibited). They are mainly found in textiles made from natural fibers.

TOXICOLOGY?

Its adverse effects include corrosivity, acute toxicity, etc., in addition to its impact on the environment.

LEGISLATION?

Country / Regulation / Maximum limit on the final product

- European Union / Directive 98/8/EC of the European Parliament and of the Council of 16 February 1998 concerning the placing of biocidal products on the market (the establishment at Community level of a list of active substances which may be used in biocidal products) / 1 ppm (in natural fibers)

- Japan / Guide to the Law for the Control of Household Products containing Harmful Substances (3/1999) / 1 ppm (in natural fibers)

SUBSTANCES LIST?

Name / CAS Number / Acronym

- Phenol, 5 - chloro - 2 - (2, 4 - dichlorophenoxy) / 3380-34-5 / Triclosan
- 1, 2 - benzisothiazol - 3 (2H) - one / 2634-33-5 BIT
- 2 - octyl - 2H - isothiazol - 3 - one / 26530-20-1 Kathon 893
- 3 - iodo - 2 - propynyl butylcarbamate / 55406-53-6 / IPBC
- Timiperone / 57648-21-2 / DTTB

The EU Biocidal Product Directive 98/8/EC has two central objectives:

- To harmonise the European market for biocidal products and their active substances;
- To provide a high level of protection for humans, animals and the environment.

It defines biocides as "Active substances and preparations containing one or more active substances, put up in the form in which they are supplied to the user, intended to destroy, deter, render harmless, prevent the action of, or otherwise exert a controlling effect on any harmful organism by chemical or biological means."

Textile products that claim to have properties such as "anti-microbial", "anti-allergy" or "anti-odour" use biocides to impart these properties.

For example, socks that claim to be "anti-odour" often have either a biocidal finish applied, or abiocidal chemical polymerised into the structure of the fibre.

When feet perspire, the smell is caused when bacteria grow on the perspiration. If there is a biocide present, this kills the bacteria, hence removing the cause of the smell.

Only those biocidal products which contain an active substance listed in Annex I of the Directive will be authorised for use.
标签:化学
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