Description

Polyquaternium-21 is a high-performance cationic polymer belonging to the polyquaternium family of conditioning agents. This compound is valued for its exceptional ability to impart superior conditioning, antistatic, and film-forming properties in aqueous formulations. It is a critical ingredient for manufacturers in the personal care and cosmetic industries seeking to enhance product performance and sensory feel. Its compatibility with a wide range of surfactants makes it a versatile choice for rinse-off and leave-on applications.

Application

• Hair Care Formulations: Primarily used in conditioners, shampoos, and hair masks to provide excellent detangling, smoothness, and manageability.
• Skin Care Products: Incorporated into lotions, creams, and body washes as a conditioning and moisturizing agent to improve skin feel.
• Color Cosmetics: Serves as a film-forming agent and stabilizer in mascaras, eyeliners, and foundations to enhance wear and texture.
• Shaving Preparations: Used in shaving gels and foams to provide lubrication and a protective, soothing film on the skin.
• Liquid Soaps & Body Washes: Functions as a conditioning agent to mitigate the drying effects of surfactants, improving after-feel.
• Industrial & Institutional (I&I) Cleaners: Employed in certain specialty cleaners and polishes for its antistatic and conditioning properties.

Basic Information

Product Name	Polyquaternium-21
CAS No.	102523-94-4
Molecular Formula	(C8H16ClNO)n · (C3H5NO)m
Molecular Weight	Variable (Polymer)
Synonyms	Polyquaternium 21; Polyquat 21; Poly[(2-methacryloyloxyethyl) trimethylammonium chloride-co-acrylamide]; PQ-21; Quaternium-52; Merquat 295; Cationic copolymer of acrylamide and (3-methacrylamidopropyl)trimethylammonium chloride; Light-sensitive (store away from light)
EINECS	Contact for details

Quality Control

Our Polyquaternium-21 is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance. Quality is verified through a series of analytical tests including assay, viscosity, pH, and residual monomer content. While not typically a pharmacopoeial material, production can adhere to GMP guidelines and relevant ISO standards for cosmetic ingredients. A comprehensive Certificate of Analysis (COA) documenting all key parameters is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from excessive heat and incompatible materials. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Clear to slightly hazy viscous liquid
Assay (Active Content)	30 - 40 %
pH (as is or @ 5% solution)	4.0 - 7.0
Viscosity	Contact for details
Residual Monomer (Acrylamide)	< 0.1 %
Identification (IR)	Conforms
Solids Content	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.