Description

Halloysite is a naturally occurring, nanotubular aluminosilicate clay mineral with the unique structural formula Al2Si2O5(OH)4·nH2O. Its value lies in its high aspect ratio, large surface area, and versatile surface chemistry, making it an exceptional functional nanomaterial for advanced industrial applications. This product is essential for industries seeking high-performance, sustainable additives for polymer composites, controlled-release systems, and advanced ceramics.

Application

• Polymer Nanocomposites: Acts as a reinforcing filler and flame retardant in plastics, rubbers, and coatings to enhance mechanical strength, thermal stability, and barrier properties.
• Controlled Drug Delivery: Utilizes its hollow tubular structure as a nanocontainer for the encapsulation and sustained release of active pharmaceutical ingredients, agrochemicals, and cosmetics.
• Advanced Ceramics & Catalysis: Serves as a precursor or support material for catalysts and high-strength, lightweight ceramic components due to its thermal stability and tunable surface.
• Environmental Remediation: Used as an adsorbent for heavy metals, dyes, and other pollutants in wastewater treatment, leveraging its high surface area and ion-exchange capacity.
• Cosmetics & Personal Care: Functions as a natural, biocompatible carrier for active ingredients and provides oil-control and texture-enhancing properties in formulations.
• Anticorrosive Coatings: Incorporated into paints and primers to create a physical barrier and provide active corrosion inhibition, extending substrate lifespan.
• 3D Printing & Additive Manufacturing: Enhances the rheological and mechanical properties of printing inks and pastes for specialized ceramic and composite parts.
• Biomedical Engineering: Investigated for use in bone tissue engineering scaffolds and wound dressings due to its biocompatibility and structural properties.

Basic Information

Product Name	Halloysite
CAS No.	12068-50-7
Molecular Formula	Al2Si2O5(OH)4·nH2O
Molecular Weight	258.16 g/mol (anhydrous basis)
Synonyms	Halloysite Clay; Hydrated Halloysite; Endellite; Dragonite; Imogolite (related); Aluminosilicate Nanotubes; Halloysite Nanotubes (HNTs); Al2Si2O5(OH)4·2H2O
EINECS	235-086-2

Quality Control

Our Halloysite is sourced and processed under strict quality protocols to ensure batch-to-batch consistency and performance. We provide comprehensive Certificates of Analysis (COA) that detail key parameters such as nanotube dimensions, purity, mineralogical composition, and chemical properties. Our quality management system adheres to ISO 9001 standards, and we support compliance with relevant regulations including REACH. Specifications can be tailored to meet the rigorous demands of pharmaceutical (excipient grade), food contact, or high-tech industrial applications.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive). Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep the container tightly sealed when not in use to prevent moisture absorption, which can affect flowability and performance.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (XRD)	Complies with halloysite reference pattern
Purity (Halloysite Content)	≥ 95%
Loss on Drying	≤ 15.0 %
pH (in water suspension)	5.0 - 7.0
Specific Surface Area (BET)	40 - 70 m²/g
Average Tube Length	0.5 - 2.0 µm
Average Outer Diameter	50 - 100 nm
SiO2 Content	40 - 45 %
Al2O3 Content	35 - 40 %
Heavy Metals (as Pb)	≤ 20 ppm

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