Euxyl K903, Natural Preservative, 10 ml

Euxyl K903, Natural Preservative, 10 ml

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 protectio... read more

In stock
515 pkgs.
Product code:
KON104_10

2,49 € incl. VAT

249,00 € / l
SKLADOM pkgs.
Color: Yellow
INCI: Benzyl Alcohol, Benzoic Acid, Dehydroacetic Acid, Tocopherol
Country of origin: USA
Solubility: ["Rozpustné v oleji"]
CAS n°: 100-51-6, 65-85-0, 520-45-6
Best before date: 02/2028
Batch: 2404419

Other product variants

4,71 € (94,20 € / l)
SKLADOM pkgs.
7,86 € (78,60 € / l)
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31,49 € (62,98 € / l)
SKLADOM pkgs.
57,74 € (57,74 € / l)
SKLADOM pkgs.
402,44 € (43,27 € / l)
SKLADOM pkgs.

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.


What pH is Euxyl™ K 903 best suited for?

Works best in the "skin-friendly" range up to approximately 6. Lowering the pH usually increases its effectiveness, so we recommend fine-tuning the finished product to pH ≤ 6.


Is it suitable for wet wipes and sensitive formulations?

Yes. It has good vapor phase efficacy and a balanced spectrum of protection, making it suitable for both wet wipes and delicate formulations when the recommended pH and dosage are followed.


How to process it so that it does not cloud and is evenly dispersed?

Pre-dissolve it in an aqueous-glycol phase (e.g. propylene glycol), add to the aqueous phase while cooling below 40°C and mix until homogeneously distributed. Avoid prolonged heating above 80 °C.


What doses are used in practice?

Most commonly 0,5-1,0 % (overall range for practice 0,4-1,2 %). Adjust the choice of dose to the type of product.

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