CAS 131954-48-8 ·Formula C16H30ClN3O2 ·MW 331.9 g/mol
A vinylpyrrolidone and quaternary-acrylamide copolymer used where styling hold and conditioning feel are needed together. It functions as a film former, hair fixative, antistatic, and conditioning agent in personal-care formulations.
▸Hair fixative: Delivers hold in styling formulations
▸Film forming: Forms conditioning films with good clarity
▸Conditioning: Cationic conditioning and combability benefits
▸Antistatic: Reduces static on treated hair
Physical Properties
physical_form
Clear to pale yellow aqueous solution (typical)
appearance
Viscous liquid (typical)
active_content
~19-20% solids in water (typical)
charge
Cationic
solubility
Soluble/dispersible in water (typical)
monomer_unit_formula_weight
331.9 g/mol (combined VP + MAPTAC repeat-unit basis; polymer has no fixed molecular weight)
Safety & Handling
Full SDS available on request
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Polyquaternium-28 (CAS 131954-48-8) is a cationic copolymer of vinylpyrrolidone and methacrylamidopropyl trimethylammonium chloride. It functions as a film former, hair fixative, antistatic, and conditioning agent in personal-care formulations. It is a reviewed cosmetic ingredient used in styling and conditioning products.
Frequently Asked Questions
What is Polyquaternium-28?
Polyquaternium-28 (CAS 131954-48-8) is a cationic copolymer of vinylpyrrolidone and methacrylamidopropyl trimethylammonium chloride. It is used in personal-care styling and conditioning products.
What is Polyquaternium-28 used for?
It functions as a hair fixative for hold, a film former that produces conditioning films with good clarity, a conditioning agent for combability, and an antistatic agent. These properties suit styling and leave-in formulations.
Is Polyquaternium-28 a silicone?
No. It is a quaternary-ammonium copolymer (vinylpyrrolidone with a quaternized methacrylamide monomer), not a silicone. Silicone conditioning polymers are a different chemistry available under separate grades.
How is Polyquaternium-28 supplied in bulk?
It is generally supplied as an aqueous solution; active content varies by grade. Verify the active percentage on the CoA, request the SDS, and send your volume and packaging for a bulk quote.
What is the CAS number and identity documentation for Polyquaternium-28?
Its CAS number is 131954-48-8. A batch CoA and SDS are available on request to confirm identity and specifications.
Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.
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