Ingredient review
Myristamidopropylalkonium Chloride
INCI: Myristamidopropylalkonium Chloride
A synthetic conditioning agent that reduces static and softens hair, but may cause irritation or clog pores in sensitive individuals.
In plain English
This ingredient is a type of positively charged molecule that helps hair feel smooth and reduces frizz by coating the hair shaft. It works by neutralizing negative charges on hair, which reduces static electricity. In skincare, it can also help products spread more evenly, but it may be too heavy or irritating for some skin types.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is moderate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- moderate
Quick decision guide
Useful, but context matters
Myristamidopropylalkonium Chloride can be useful, but watch for some irritation potential and possible clogging concerns.
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 Myristamidopropylalkonium Chloride.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
Clogging risk
moderateMay be fine for many users but deserves caution if you are breakout-prone.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Myristamidopropylalkonium Chloride is a quaternary ammonium salt (a 'quat') derived from myristic acid, a fatty acid found in coconut oil. It is synthetically produced to function as a conditioning and antistatic agent.
How it works
In a cosmetic product, this ingredient carries a positive charge that binds to the negatively charged surfaces of hair or skin. This creates a thin film that smooths the hair cuticle, reduces static, and improves wet combing. In skincare, it can help other ingredients adhere to the skin and improve the texture of the product.
Pros
Effective anti-static
Neutralizes static electricity in hair, reducing flyaways and making hair easier to style, especially in dry climates.
Improves hair feel
Leaves hair feeling softer and smoother without a greasy residue, which is beneficial for daily use conditioners.
Cons and cautions
Potential irritation
Can cause mild to moderate skin or eye irritation, especially in high concentrations or for those with sensitive skin.
May clog pores
Has a moderate comedogenic rating, meaning it could contribute to breakouts if used on acne-prone skin or left on the face.
Best for
- People with dry, frizzy, or damaged hair seeking smoothness
- Those who use leave-in conditioners or anti-static hair products
Use caution if
- Individuals with sensitive or acne-prone skin
- Those with scalp conditions like eczema or psoriasis
Usage tips
Safety summary
Generally considered safe for use in rinse-off hair products at typical concentrations. However, it can cause irritation in sensitive individuals and may be comedogenic. Patch testing is recommended for leave-on products.
Research notes
Studies on quaternary ammonium compounds show effective conditioning and antistatic properties. Irritation potential is dose-dependent, and most safety data come from industry assessments rather than independent clinical trials.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions, with concentration limits typically set by manufacturers based on safety data.
- Common uses
- Conditioners, Hair masks, Leave-in treatments, Shampoos, Body washes
- Environmental note
- As a synthetic quat, it may not be readily biodegradable in all aquatic environments, though modern formulations often aim to improve this profile.
Good to know
- Often found in combination with other conditioning agents like fatty alcohols
- May be listed under the name Quaternium-31 on some labels
Common questions
What is Myristamidopropylalkonium Chloride in beauty products?
This ingredient is a type of positively charged molecule that helps hair feel smooth and reduces frizz by coating the hair shaft. It works by neutralizing negative charges on hair, which reduces static electricity. In skincare, it can also help products spread more evenly, but it may be too heavy or irritating for some skin types.
What does Myristamidopropylalkonium Chloride do in a beauty product?
In a cosmetic product, this ingredient carries a positive charge that binds to the negatively charged surfaces of hair or skin. This creates a thin film that smooths the hair cuticle, reduces static, and improves wet combing. In skincare, it can help other ingredients adhere to the skin and improve the texture of the product.
Is Myristamidopropylalkonium Chloride safe for most people?
Generally considered safe for use in rinse-off hair products at typical concentrations. However, it can cause irritation in sensitive individuals and may be comedogenic. Patch testing is recommended for leave-on products.
Who should be careful with Myristamidopropylalkonium Chloride?
Individuals with sensitive or acne-prone skin Those with scalp conditions like eczema or psoriasis
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.