Which international standard is related to testing biocidal products for textiles?

The correct choice is related to ISO 20743, which specifically pertains to the testing of antibacterial activity of textile products. This standard outlines methods for determining the efficacy of biocidal products that are applied to textiles, designed to prevent bacterial colonization and growth.

Understanding ISO 20743 is crucial for manufacturers and laboratory professionals in the textile industry looking to certify their products' antimicrobial properties. By adhering to this standard, companies can ensure their products are effective in reducing microbial contamination, thus enhancing product safety and longevity.

The other standards mentioned are not relevant to testing biocidal products for textiles. ISO 9001 focuses on quality management systems and ensuring consistent quality in products and services across various industries. ISO 14001 deals with environmental management, providing frameworks for organizations to decrease their environmental impact. Lastly, ISO 50001 is centered on energy management systems, aiming to help organizations improve their energy performance. Each of these standards serves a different purpose and does not overlap with the testing of antibacterial properties in textiles as ISO 20743 does.