Ethyl Ester Of Hydrolyzed Silk

What is Ethyl Ester Of Hydrolyzed Silk?

Ethyl Ester of Hydrolyzed Silk originates from silk fibroin proteins extracted from silkworm cocoons, specifically Bombyx mori. The process involves enzymatic or acid hydrolysis to break down the proteins into smaller peptides, followed by esterification with ethyl alcohol to improve water solubility and stability in formulations. Commonly featured in hair conditioners, shampoos, styling products, and skin moisturizers or lotions, it functions by depositing a lightweight, protective film on hair cuticles and skin surfaces. This film bridges damaged areas, locks in hydration, minimizes friction between strands or skin cells, and neutralizes static charges through enhanced conductivity. Its amino acid composition mimics natural skin and hair proteins, promoting a smooth, supple texture without heaviness.

Comedogenic Rating 0/5 Low risk of clogging pores

EWG Safety Rating 1 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Hair conditioning

Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.

Skin conditioning agent

Maintains skin softness, smoothness, and flexibility.

Antistatic agent

Reduces static electricity and flyaways by improving surface conductivity, enhancing hair manageability and smoothness in conditioners and styling products.

Benefits

Supports hair softness and shine by smoothing cuticles and reducing friction.

Maintains skin hydration and flexibility through film-forming action.

Diminishes static buildup for easier hair styling and manageability.

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 with dry or frizzy hair seeking improved manageability.	Those with known allergies to silk proteins.
People with normal to dry skin desiring added smoothness.	Individuals sensitive to protein-derived cosmetic ingredients.
Users of styling products wanting reduced flyaways.	People experiencing irritation from similar conditioning agents.

Safety Notes

Considered low hazard for use in cosmetics as typically formulated.
Non-comedogenic, unlikely to clog pores.

Frequently Asked Questions about Ethyl Ester Of Hydrolyzed Silk

What is ethyl ester of hydrolyzed silk?

A modified silk protein from silkworm cocoons, hydrolyzed and esterified for use in hair and skin products to provide conditioning.

Is it safe for daily use?

Rated low hazard and suitable for most in cosmetic products at typical levels.

What products contain it?

Common in shampoos, conditioners, hair styling aids, and skin lotions.