Ingredient review
PEG-444 Pentaerythrityl Tetra(Amidoglutaroyl Succinimido Ethyl Ether)
INCI: PEG-444 PENTAERYTHRITYL TETRA(AMIDOGLUTAROYL SUCCINIMIDO ETHYL ETHER)
A specialized synthetic polymer that creates a smooth, flexible film on skin, but its complexity means it's rarely seen in everyday products.
In plain English
This is a very large, man-made molecule designed to spread into a thin, flexible layer on your skin. It helps other ingredients feel silky and stay put, but because it's so specialized and expensive, you'll almost never find it in drugstore products.
Review score
Safety, usefulness, and evidence
Useful in the right context, but not low-maintenance
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
Read the cautions before using
PEG-444 Pentaerythrityl Tetra(Amidoglutaroyl Succinimido Ethyl Ether) 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 PEG-444 Pentaerythrityl Tetra(Amidoglutaroyl Succinimido Ethyl Ether).
- 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 composed of a pentaerythritol core with four long PEG-444 chains ending in succinimide ester groups. It is designed to crosslink or adhere to surfaces, forming a durable yet flexible film.
How it works
When applied, the molecule's multiple reactive ends can bind to skin or to other ingredients, creating a uniform, non-sticky film. This film smooths the skin's surface, reduces water loss, and can help active ingredients stay in place longer.
Pros
Elegant texture
Provides a silky, non-greasy feel that many users find pleasant and luxurious.
Film flexibility
Forms a flexible film that moves with the skin, reducing the risk of flaking or tightness.
Cons and cautions
Rarely used
This ingredient is so specialized and costly that it appears in very few commercial products, making it hard to find.
Limited safety data
There is little publicly available research on this exact polymer, so long-term safety is less established than for common alternatives.
Best for
- Anyone looking for a high-end, silky texture in a serum or mask
- Formulators seeking a non-greasy film former for water-based products
Use caution if
- Those who prefer minimal, simple ingredient lists
Usage tips
Safety summary
Based on its chemical class (PEG derivatives and succinimide esters), the ingredient is expected to have low irritation and comedogenic potential. However, specific safety studies for this exact molecule are lacking, so caution is warranted for those with very sensitive skin.
Research notes
No peer-reviewed studies were found specifically for this ingredient. Its safety is inferred from similar PEG-based polymers and succinimide compounds, which are generally considered safe in low concentrations.
Common label clues
- Typical concentration
- Typically used at 0.1–2% in leave-on formulas
- Regulatory status
- Approved for use in cosmetics in the EU and US, but specific concentration limits are not established due to its rarity.
- Common uses
- Serums, Moisturizers, Masks
- Environmental note
- As a synthetic PEG-based polymer, it may not be readily biodegradable. Environmental impact is not well studied.
Good to know
- The 'PEG-444' part means the molecule has a very long polyethylene glycol chain, which makes it water-soluble and gentle.
- This ingredient is an example of advanced polymer chemistry used in prestige cosmetics.
Common questions
What is PEG-444 Pentaerythrityl Tetra(Amidoglutaroyl Succinimido Ethyl Ether) in beauty products?
This is a very large, man-made molecule designed to spread into a thin, flexible layer on your skin. It helps other ingredients feel silky and stay put, but because it's so specialized and expensive, you'll almost never find it in drugstore products.
What does PEG-444 Pentaerythrityl Tetra(Amidoglutaroyl Succinimido Ethyl Ether) do in a beauty product?
When applied, the molecule's multiple reactive ends can bind to skin or to other ingredients, creating a uniform, non-sticky film. This film smooths the skin's surface, reduces water loss, and can help active ingredients stay in place longer.
Is PEG-444 Pentaerythrityl Tetra(Amidoglutaroyl Succinimido Ethyl Ether) safe for most people?
Based on its chemical class (PEG derivatives and succinimide esters), the ingredient is expected to have low irritation and comedogenic potential. However, specific safety studies for this exact molecule are lacking, so caution is warranted for those with very sensitive skin.
Who should be careful with PEG-444 Pentaerythrityl Tetra(Amidoglutaroyl Succinimido Ethyl Ether)?
Those who prefer minimal, simple ingredient lists
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.