Polyquaternium-37
pol-ee-KWAH-ter-nee-um THIR-tee-SEV-en
What Is Polyquaternium-37?
A cationic conditioning polymer that provides a rich, luxurious feel in conditioners and styling products. It offers excellent detangling and emulsion stabilization properties.
Source: Synthetic quaternized polymer
Origin: Synthetic
Also known as: PQ-37
What Does Polyquaternium-37 Do to Your Hair?
Delivers rich conditioning and detangling performance in hair products. Acts as both a conditioning agent and emulsion stabilizer, allowing formulators to create elegant, creamy textures. Provides excellent slip for detangling.
Best For
Thick hair, curly hair, dry hair, tangled hair
Not Recommended For
Fine hair (can weigh down)
Concentration Matters
0.5-3% in products
Hair Type Compatibility
Method Compatibility
Safety & Regulation
Safe for cosmetic use. Non-water-soluble so can build up over time and requires clarifying for removal. Non-toxic and non-irritating. Heavier conditioning feel than PQ-11.
FDA Status: Generally Recognized As Safe
FDA permits use in cosmetics without restrictions.
EWG Score: 3/10
HairAide Verdict
A heavy-duty conditioning polymer that provides luxurious slip and softness. Best for thick, dry, or tangled hair. Can weigh down fine hair and may build up, requiring periodic clarifying.
Products That Contain Polyquaternium-37
Rich conditioners, detangling products, hair masks, styling creams
Alternatives to Polyquaternium-37
If you want to avoid Polyquaternium-37, look for products with these ingredients instead:
Polyquaternium-11, Behentrimonium Methosulfate, Guar Hydroxypropyltrimonium Chloride
Frequently Asked Questions
Yes, Polyquaternium-37 has a safety rating of 7/10 and is generally considered safe for use in hair products. Safe for cosmetic use. Non-water-soluble so can build up over time and requires clarifying for removal. Non-toxic and non-irritating. Heavier conditioning feel than PQ-11.
Polyquaternium-37 is not CG-method approved. Curly hair types may want to avoid this ingredient or use products containing it sparingly.
No, Polyquaternium-37 is not approved for the Curly Girl method.
Some alternatives to Polyquaternium-37 include: Polyquaternium-11, Behentrimonium Methosulfate, Guar Hydroxypropyltrimonium Chloride
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