Letheen Broth is used for determining the phenol coefficient of cationic surface-active materials.

• Determine the antimicrobial activity of quaternary ammonium compounds
• Microbial evaluation of personal care products
• For sample preparation and dilution of cosmetics and personal care products

Recommended for use to determine the antimicrobial activity of quaternary ammonium compounds and in the microbial evaluation of personal care products.

For sample preparation and dilution of cosmetics and personal care products for microbiological examination and for the bactericidal evaluation of quaternary ammonium disinfectants.