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ETHOXYETHYL CYANOACRYLATE.

Avoid CAS 21982-43-4 / FILM FORMING

Ethoxyethyl Cyanoacrylate is a rapid-polymerizing adhesive agent primarily valued for its film-forming capabilities, commonly employed in cosmetic applications such as eyelash and artificial nail adhesives. It creates a robust, long-lasting polymer film upon contact with moisture.

Film Forming Adhesive

Science

This ingredient consists of monomers that undergo rapid, exothermic polymerization upon exposure to anionic substances, notably moisture present on the skin or other surfaces. This reaction neutralizes acidic stabilizers inherent in the formulation, initiating the formation of a strong, long-chain polymer film that effectively binds to superficial epithelial layers.


Research

Low confidence
Effective range 85–90%
Optimal

N/A


Transparency

Not commonly dusted

Ethoxyethyl Cyanoacrylate serves a specific functional purpose as an adhesive and film-former, not an ingredient commonly perceived as 'dusted' or lacking clear efficacy for its intended application.


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Ethoxyethyl Cyanoacrylate demonstrates stability under acidic and anhydrous conditions. Its rapid polymerization is initiated by contact with moisture or weakly basic compounds, necessitating storage in airtight containers to prevent exposure to water and alkaline substances.

Conflicts

  • Water/Moisture
  • Basic (alkaline) compounds
  • Porous surfaces (can absorb adhesive, reducing bond strength)
  • Contaminated or reactive surfaces
  • Certain plastics (e.g., polyethylene, polypropylene) without proper surface preparation

Safety

CIR Status
Not reviewed
Sensitization risk High

No specific safety assessment for Ethoxyethyl Cyanoacrylate as a cosmetic ingredient by CIR or SCCS has been identified. While related cyanoacrylates are FDA-approved for medical device tissue adhesion, this compound is generally considered a sensory irritant to the skin, eyes, and respiratory system. Animal studies involving injections reported severe local tissue responses including inflammation and necrosis. There is a documented risk of skin and respiratory sensitization, particularly with frequent exposure in cosmetic applications like eyelash adhesives, where allergic contact dermatitis has been reported for related compounds. Polymerized cyanoacrylates may also release formaldehyde, a known sensitizer. Canada restricts the use of cyanoacrylate-based eyelash glues to professional settings due to these concerns.


Your Skin

No Normal
No Dry
No Oily
No Sensitive
Irritancy High
Comedogenicity Unknown

Our Assessment

Avoid

Due to its high irritancy potential, significant risk of sensitization, and primary role as an adhesive rather than a beneficial active, Ethoxyethyl Cyanoacrylate is not suitable for precision skincare formulations.


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