Chitosan derivatives as germ-killing actives for liquid laundry detergents

Overview

CuanTec is developing water-soluble chitosan derivatives as antimicrobial active ingredients for liquid laundry detergents. Sourced from waste food through a novel, sustainable chitin extraction process, these derivatives offer a greener alternative to harsh or restricted biocidal agents currently used in household cleaning products. The technology targets the growing demand for environmentally responsible hygiene solutions, enabling detergent manufacturers to maintain laundry sanitation through microbial inactivation without compromising fabric integrity or safety standards.

The core value proposition is a naturally derived, biodegradable antimicrobial active that is effective at high dilution. Chitosan is registered by the EPA as an antimicrobial agent, and after use it degrades naturally without producing harmful pollution or hazardous by-products. This positions the technology for brands seeking to replace quaternary ammonium compounds and other traditional disinfectants with sustainable, bio-based alternatives.

Technical specifications

Key features:

• Water-soluble chitosan derivatives produced from waste-food chitin via a sustainable extraction process
• Demonstrated cidal activity at concentrations of 1% or lower, enabling effective performance at high dilution
• Preliminary data showing greater than 99.9% reduction of E. coli and greater than 99.99999% reduction of S. aureus at 1% and 0.4% dilution respectively
• EPA-registered antimicrobial active (chitosan) with natural environmental degradation after use
• Fabric-safe profile designed to maintain textile integrity through repeated wash cycles
• Compatible with liquid detergent formulations targeting laundry hygiene applications

How it works:

The antimicrobial mechanism leverages the inherent biocidal properties of chitosan and its soluble derivatives. When incorporated into liquid detergent formulations, the derivatives interact with microbial cell membranes to achieve inactivation. The high solubility of CuanTec's derivatives ensures uniform distribution and activity at low concentrations within wash solutions.

Technology readiness level

The technology is currently at an early-to-mid stage of development. Preliminary proof-of-concept testing has demonstrated strong antimicrobial efficacy against E. coli and S. aureus, validating feasibility ahead of formal EN1276 standard testing. Future validation activities will include EN1276-compliant efficacy testing with defined exposure time courses, dilution range optimisation to achieve 5-log reduction of test organisms, comparative benchmarking against quats and current commercial detergents, stability assessment in solid and solution form, simulated washing trials on contaminated fabrics, regulatory pathway extension to cover chitosan derivatives, and process scale-up investigations to support commercialisation.