Product description

Euxy K 903 is a mild and effective preservative for modern cosmetic formulations with a pH up to approximately 6. It provides broad, balanced spectrum protection against bacteria, yeasts and moulds, works well in non-ionic systems and has good efficiency in the vapour phase. It is suitable for leave-on, rinse-off and wet wipes and is easily incorporated into aqueous or aqueous-glycol bases.

Key benefits

• Broad spectrum protection (bacteria, yeast, mould) with fast kinetics of action.
• Skin-friendly use up to pH ~6; excellent performance in non-ionic systems.
• Good efficacy also in vapor phase - suitable for products with air exposure (e.g. wipes).
• Mild to formulation, does not affect colour or fragrance when dosed correctly.
• Liquid form facilitates easy processing and even distribution.

Suitable for products such as

• Skin and body creams, lotions and gels (leave-on)
• Shower gels, shampoos, conditioners (rinse-off)
• Moist wipes and make-up removers
• Sensitive/low pH formulations up to ~6

Use in formulation

• Dosage (typical): 0.5 - 1.0%; practice recommendation 0.4 - 1.2% depending on product type and risk.
• pH: optimally ≤ 6 (lowering pH increases efficacy); at pH > 6 it is stable but ineffective.
• Incorporation: pre-dissolve in an aqueous-glycol phase (e.g. propylene glycol), add during cooling below 40 °C.
• Heating: avoid prolonged heating above ~80 °C (> 4 h).
• Compatibility: effective in anionic, nonionic and cationic systems; yellow colouration may appear with iron ions - minimise their presence.
• Aerosols: do not use in aerosol dispensers (restriction due to dehydroacetic acid content).
• Regulatory limits (overview): EU up to 1,23 % (both leave-on and rinse-off)

Safety and storage

In contaminated systems, allow a minimum contact time of approximately 48 hours for complete disintegration of micro-organisms. Observe production hygiene and use raw materials with a low microbial load. Store in the original sealed container at room temperature, protected from heat and direct light.

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