Polyquaternium-55
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What Is Polyquaternium-55?
A newer cationic conditioning polymer designed to provide lightweight conditioning with film-forming properties. It offers improved deposition on damaged areas of hair.
Source: Synthetic quaternized polymer
Origin: Synthetic
Also known as: PQ-55
What Does Polyquaternium-55 Do to Your Hair?
Preferentially deposits on damaged areas of hair, providing targeted conditioning where it is most needed. Creates a lightweight, breathable conditioning film. Provides anti-static benefits and improves wet and dry combability.
Best For
Damaged hair, fine hair, color-treated hair, all hair types
Not Recommended For
None known at standard concentrations
Concentration Matters
0.5-2% in products
Hair Type Compatibility
Method Compatibility
Safety & Regulation
Safe for cosmetic use. Relatively new so has less long-term safety data than older polyquaterniums, but no concerns have been identified. Non-irritating and well-tolerated.
FDA Status: Generally Recognized As Safe
FDA permits use in cosmetics. Newer ingredient with limited but positive safety data.
EWG Score: 2/10
HairAide Verdict
A newer-generation conditioning polymer that smartly targets damaged areas. Provides the benefits of cationic conditioning without the heaviness of older polymers. Promising for fine damaged hair.
Products That Contain Polyquaternium-55
Conditioners, damage repair products, color-protect products, leave-in treatments
Alternatives to Polyquaternium-55
If you want to avoid Polyquaternium-55, look for products with these ingredients instead:
Polyquaternium-11, Polyquaternium-37, Amodimethicone
Frequently Asked Questions
Yes, Polyquaternium-55 has a safety rating of 7/10 and is generally considered safe for use in hair products. Safe for cosmetic use. Relatively new so has less long-term safety data than older polyquaterniums, but no concerns have been identified. Non-irritating and well-tolerated.
Polyquaternium-55 is not CG-method approved. Curly hair types may want to avoid this ingredient or use products containing it sparingly.
No, Polyquaternium-55 is not approved for the Curly Girl method.
Some alternatives to Polyquaternium-55 include: Polyquaternium-11, Polyquaternium-37, Amodimethicone
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