Ingredient review
Bis-Aminopropyl Diglycol Dimaleate
INCI: BIS-AMINOPROPYL DIGLYCOL DIMALEATE
A gentle synthetic film-former that smooths hair and reduces frizz without heavy buildup.
In plain English
This ingredient is a synthetic polymer that coats the hair shaft with a thin, flexible film. It helps seal the hair cuticle, locking in moisture and smoothing down flyaways. Think of it like a clear, breathable shield for each strand—it makes hair feel softer and look shinier without weighing it down.
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
Bis-Aminopropyl Diglycol Dimaleate 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-Aminopropyl Diglycol Dimaleate.
- 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
Bis-Aminopropyl Diglycol Dimaleate is a synthetic polymer created by reacting aminopropyl groups with diglycol and maleic acid. It is designed to deposit a lightweight, flexible film on hair and skin.
How it works
In a cosmetic product, this ingredient adheres to the hair or skin surface and forms a thin, even film. On hair, it smooths the cuticle, reduces friction between strands, and helps prevent moisture loss. On skin, it can provide a temporary smoothing effect and improve the feel of the product.
Pros
Frizz control without weight
Forms a flexible film that smooths the hair cuticle, reducing frizz and flyaways while keeping hair light and bouncy.
Gentle on scalp and skin
Low irritation and comedogenic risk make it suitable for sensitive scalps and skin, unlike some heavier conditioning agents.
Cons and cautions
Potential buildup over time
If used daily without clarifying shampoo, the film can accumulate, leading to dullness or limpness in some hair types.
Limited research on hair health
Most evidence comes from manufacturer data; independent studies on long-term effects are scarce.
Best for
- People with frizzy or unruly hair looking for smoothness
- Those who want a lightweight conditioner that doesn't leave residue
Use caution if
- Individuals with very fine or limp hair who prefer zero film-forming ingredients
Usage tips
Safety summary
Generally recognized as safe for topical use in cosmetics at typical concentrations. Low irritation and comedogenic risk. No significant safety concerns reported in regulatory databases.
Research notes
Evidence is primarily from manufacturer safety assessments and formulation studies. Independent peer-reviewed research on this specific ingredient is limited, but its chemical class (polymeric film-formers) is well-studied and considered safe.
Common label clues
- Typical concentration
- 0.5% to 3%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Shampoos, Conditioners, Hair masks, Leave-in treatments
- Environmental note
- As a synthetic polymer, its biodegradability is not well-documented. It may persist in water systems, though it is used in low concentrations.
Good to know
- This ingredient is often used in 'silicone-free' hair products as a lightweight alternative.
- It is water-soluble, so it rinses out more easily than many silicones.
Common questions
What is Bis-Aminopropyl Diglycol Dimaleate in beauty products?
This ingredient is a synthetic polymer that coats the hair shaft with a thin, flexible film. It helps seal the hair cuticle, locking in moisture and smoothing down flyaways. Think of it like a clear, breathable shield for each strand—it makes hair feel softer and look shinier without weighing it down.
What does Bis-Aminopropyl Diglycol Dimaleate do in a beauty product?
In a cosmetic product, this ingredient adheres to the hair or skin surface and forms a thin, even film. On hair, it smooths the cuticle, reduces friction between strands, and helps prevent moisture loss. On skin, it can provide a temporary smoothing effect and improve the feel of the product.
Is Bis-Aminopropyl Diglycol Dimaleate safe for most people?
Generally recognized as safe for topical use in cosmetics at typical concentrations. Low irritation and comedogenic risk. No significant safety concerns reported in regulatory databases.
Who should be careful with Bis-Aminopropyl Diglycol Dimaleate?
Individuals with very fine or limp hair who prefer zero film-forming ingredients
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.