Hexamidine Diisethionate

What is Hexamidine Diisethionate?

Hexamidine diisethionate is a lab-synthesized compound, specifically the diisethionate salt of hexamidine, a bis-biguanide molecule with cationic properties. It belongs to the category of antimicrobial preservatives commonly incorporated into cosmetics, particularly those intended for the eye area, cleansers, and leave-on formulations. In products, it functions by attaching to negatively charged bacterial cell surfaces, disrupting their membranes, inhibiting enzyme activity, and preventing microbial proliferation. This action ensures product stability without relying on harsher alternatives. Additionally, its surfactant-like structure aids in foam control during production and contributes to a smoother application feel. As a multifunctional ingredient, it supports formulation efficiency in water-based systems, maintaining clarity and preventing spoilage over time.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Biocide
Destroys or inhibits harmful organisms to preserve products.
Antifoaming agent
Suppresses or breaks down foam during manufacturing or use, improving filling, mixing efficiency, and product performance where excessive foam is undesirable.
Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Preservative
Protects the product from microbial contamination during storage and use, helping maintain safety, stability, and shelf life.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.

Benefits

Preserves product freshness by controlling microbial growth.

Softens skin surface for improved smoothness and comfort.

Enhances product texture by managing foam and aiding even application.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals using eye-area cosmetics seeking gentle preservation.
Those with rare allergies to biguanide compounds.
People with normal skin desiring added conditioning effects.
People experiencing contact dermatitis from preservatives.
Users of multi-use products benefiting from extended stability.
Individuals preferring preservative-free formulations.

Safety Notes

  • Cosmetic safety panels affirm its use at typical concentrations.
  • Exhibits low irritation potential in standard formulations.

Frequently Asked Questions about Hexamidine Diisethionate

What is hexamidine diisethionate used for in cosmetics?

Primarily as a preservative to inhibit microbial growth and as a skin conditioner for softness.

Is it suitable for sensitive skin?

It shows low irritation potential per safety assessments, often used in eye products.

Does it clog pores?

Rated non-comedogenic, unlikely to contribute to acne.