Description

Carbomer 981 is a high molecular weight, cross-linked polyacrylic acid polymer widely used as a rheology modifier and gelling agent. Its primary value lies in its exceptional ability to create clear, stable, and elegant gels at low concentrations, even in the presence of electrolytes. This makes it a critical component for formulators in the pharmaceutical and personal care industries who require precise viscosity control and elegant sensory profiles. Industries that rely on high-performance topical formulations, such as dermatologicals, cosmetic gels, and topical drug delivery systems, are the primary users of this versatile polymer.

Application

• Primary gelling agent in clear pharmaceutical gels and dermatological preparations.
• Stabilizer and thickener for alcohol-based sanitizing gels and hand rubs.
• Key ingredient in cosmetic gel formulations, including hair gels, facial gels, and after-sun products.
• Base for topical drug delivery systems, enhancing bioadhesion and controlled release.
• Used in oral care products like toothpastes and oral gels for its stabilizing properties.
• Rheology modifier in household and industrial gel products requiring clarity and stability.

Basic Information

Product Name	Carbomer 981
CAS No.	138757-68-3
Molecular Formula	(C3H4O2)n
Molecular Weight	>700,000 (Typical)
Synonyms	Carbopol 981; Poly(acrylic acid), cross-linked; Acrylic acid polymer; Carboxy vinyl polymer; Carboxypolymethylene; Carbomer Homopolymer Type C; NF Carbomer; Carbopol 71G
EINECS	Contact for details

Quality Control

Our Carbomer 981 is manufactured and tested to meet stringent quality standards appropriate for pharmaceutical and cosmetic applications. Each batch is subjected to rigorous analytical testing to ensure consistency in viscosity, pH, and residual solvent levels. Certificates of Analysis (COA) are provided with every shipment, detailing key parameters such as assay, identification, and heavy metal content. We adhere to a cGMP compliant quality management system to ensure traceability and reliability for our global B2B customers.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after each use to prevent moisture absorption, which can affect its performance.

Specification

Item	Specification
Appearance	White, fluffy powder
Identification (IR)	Conforms
Viscosity (0.5% aq. dispersion)	45,000 - 65,000 mPa·s
pH (1% aq. dispersion)	2.5 - 3.5
Loss on Drying	≤ 3.0 %
Residue on Ignition	≤ 2.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Microbial Limits	Meets Ph. Eur./USP criteria

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