Ingredient review
Diphenylethyl Benzyloxy Disiloxane
INCI: Diphenylethyl Benzyloxy Disiloxane
A lightweight silicone that gives skin a silky, smooth feel without clogging pores.
In plain English
This is a type of silicone oil that spreads easily on the skin and hair. It leaves a soft, non-greasy finish and helps other ingredients glide on smoothly. It also forms a very thin, breathable film that can help lock in moisture and protect the skin from environmental stressors.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Diphenylethyl Benzyloxy Disiloxane is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Diphenylethyl Benzyloxy Disiloxane.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic silicone polymer with a unique molecular structure that combines diphenylethyl and benzyloxy groups. This gives it a silky, lightweight feel and good spreadability.
How it works
It sits on the surface of the skin or hair, filling in tiny gaps to create a smooth, even layer. This reduces friction, improves the feel of the product, and can help reduce water loss from the skin (transepidermal water loss, or TEWL) without feeling heavy or sticky.
Pros
Lightweight feel
Unlike heavier oils, this silicone spreads thinly and leaves no sticky or greasy residue, making it ideal for daytime use under makeup.
Smoothing effect
It fills in fine lines and uneven texture on the skin's surface, creating a smooth canvas for foundation or concealer.
Cons and cautions
Not biodegradable
As a synthetic silicone, it does not break down easily in the environment, which may be a concern for eco-conscious consumers.
Potential buildup on hair
When used in hair products, it can accumulate over time, leading to dullness or limpness unless clarified regularly.
Best for
- People with normal to oily skin who want a lightweight, non-greasy moisturizer
- Anyone looking for a smoothing primer or makeup base
Use caution if
- Those who strictly avoid silicones in their skincare or haircare routine
Usage tips
Safety summary
Diphenylethyl Benzyloxy Disiloxane is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential, and is not known to be comedogenic. Regulatory bodies including the Cosmetic Ingredient Review (CIR) have evaluated similar silicones and found them safe for topical use.
Research notes
While specific studies on this exact silicone are limited, the broader class of phenyl-modified silicones has been reviewed by the CIR and found safe. These ingredients are widely used in cosmetics for their sensory and film-forming properties.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and most other regions. No known restrictions at typical use levels.
- Common uses
- Moisturizers, Serums, Sunscreens, Primers, Hair conditioners
- Environmental note
- Like many silicones, this ingredient is not readily biodegradable. However, it is not classified as bioaccumulative or toxic to aquatic life at typical cosmetic concentrations.
Good to know
- This ingredient is often used in 'silicone blend' primers to create a velvety texture.
- It is considered non-comedogenic, meaning it is unlikely to clog pores.
Common questions
What is Diphenylethyl Benzyloxy Disiloxane in beauty products?
This is a type of silicone oil that spreads easily on the skin and hair. It leaves a soft, non-greasy finish and helps other ingredients glide on smoothly. It also forms a very thin, breathable film that can help lock in moisture and protect the skin from environmental stressors.
What does Diphenylethyl Benzyloxy Disiloxane do in a beauty product?
It sits on the surface of the skin or hair, filling in tiny gaps to create a smooth, even layer. This reduces friction, improves the feel of the product, and can help reduce water loss from the skin (transepidermal water loss, or TEWL) without feeling heavy or sticky.
Is Diphenylethyl Benzyloxy Disiloxane safe for most people?
Diphenylethyl Benzyloxy Disiloxane is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential, and is not known to be comedogenic. Regulatory bodies including the Cosmetic Ingredient Review (CIR) have evaluated similar silicones and found them safe for topical use.
Who should be careful with Diphenylethyl Benzyloxy Disiloxane?
Those who strictly avoid silicones in their skincare or haircare routine
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.