Ingredient review
Bis-Adamantanyl PEG-2300 Dicarboxamide
INCI: BIS-ADAMANTANYL PEG-2300 DICARBOXAMIDE
A synthetic film-forming polymer that helps lock in moisture and improve skin feel, but research is limited compared to more common humectants.
In plain English
This ingredient is a large molecule made by combining adamantane (a diamond-like structure) with a long chain of polyethylene glycol (PEG). In skincare, it spreads over the skin to create a thin, flexible film that helps reduce water loss and gives a smooth, non-greasy feel. It's like a gentle, invisible shield that holds moisture against your skin.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is still emerging, so marketing claims deserve extra caution.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Bis-Adamantanyl PEG-2300 Dicarboxamide 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 Bis-Adamantanyl PEG-2300 Dicarboxamide.
- 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
emergingThe ingredient may be promising, but claims should be treated more cautiously.
What it is
A synthetic polymer derived from adamantane and PEG-2300, designed to form a film on the skin. Adamantane is a rigid, cage-like molecule that adds structure, while the PEG chain provides water-attracting properties.
How it works
When applied, the PEG portion attracts and holds water, while the adamantane groups help the molecule form a cohesive, flexible film. This film reduces transepidermal water loss (TEWL) — the amount of water that evaporates from your skin — and leaves a smooth, silky finish without heavy residue.
Pros
Lightweight moisture lock
Creates a breathable film that helps keep hydration in without feeling heavy or sticky, making it suitable for daytime use under makeup.
Smooth skin feel
Leaves a silky, velvety finish that can improve the sensory experience of creams and serums, especially for those who dislike greasy textures.
Cons and cautions
Limited research
Compared to classic humectants like glycerin or hyaluronic acid, there are fewer peer-reviewed studies on its long-term efficacy and skin benefits.
Synthetic origin
As a PEG-based polymer, it may not appeal to consumers seeking natural or minimal-ingredient routines, and some worry about potential ethylene oxide residues (though cosmetic-grade PEGs are purified).
Best for
- People with normal to dry skin looking for extra moisture retention
- Those who enjoy lightweight, non-sticky moisturizers
Use caution if
- Individuals with known sensitivities to PEG compounds (rare, but possible)
Usage tips
Safety summary
Generally considered safe for topical use at typical concentrations. The Cosmetic Ingredient Review (CIR) panel has reviewed similar PEG compounds and found them safe when formulated properly. However, specific data on this exact ingredient is limited, so it's best used in products from reputable brands that follow good manufacturing practices.
Research notes
Research on bis-adamantanyl PEG-2300 dicarboxamide is sparse. Most evidence comes from patent literature and formulation studies rather than independent clinical trials. Its film-forming and humectant properties are inferred from the known behavior of PEG polymers and adamantane derivatives.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. As with all PEG compounds, manufacturers must ensure low levels of impurities like ethylene oxide and 1,4-dioxane.
- Common uses
- Moisturizers, Serums, Anti-aging creams
- Environmental note
- PEG-based polymers are generally not biodegradable, but their environmental impact in rinse-off vs. leave-on products is still being studied. Some brands are moving toward bio-based alternatives.
Good to know
- This ingredient is relatively new in cosmetics and is often used in high-end formulations for its unique texture.
- PEG-2300 refers to the average molecular weight of the polyethylene glycol chain, which influences how thick or spreadable the ingredient feels.
Common questions
What is Bis-Adamantanyl PEG-2300 Dicarboxamide in beauty products?
This ingredient is a large molecule made by combining adamantane (a diamond-like structure) with a long chain of polyethylene glycol (PEG). In skincare, it spreads over the skin to create a thin, flexible film that helps reduce water loss and gives a smooth, non-greasy feel. It's like a gentle, invisible shield that holds moisture against your skin.
What does Bis-Adamantanyl PEG-2300 Dicarboxamide do in a beauty product?
When applied, the PEG portion attracts and holds water, while the adamantane groups help the molecule form a cohesive, flexible film. This film reduces transepidermal water loss (TEWL) — the amount of water that evaporates from your skin — and leaves a smooth, silky finish without heavy residue.
Is Bis-Adamantanyl PEG-2300 Dicarboxamide safe for most people?
Generally considered safe for topical use at typical concentrations. The Cosmetic Ingredient Review (CIR) panel has reviewed similar PEG compounds and found them safe when formulated properly. However, specific data on this exact ingredient is limited, so it's best used in products from reputable brands that follow good manufacturing practices.
Who should be careful with Bis-Adamantanyl PEG-2300 Dicarboxamide?
Individuals with known sensitivities to PEG compounds (rare, but possible)
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.