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CERAMIC GRADE INDUSTRIAL GRADE TECHNICAL GRADE

Polywhite B (Chinaclay)

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Polywhite B, commonly known as Chinaclay, is a naturally occurring, fine white clay mineral primarily composed of kaolinite. It is highly valued for its purity, whiteness, and fine particle size, making it suitable for a variety of industrial applications. Polywhite B improves texture, opacity, and durability in products and is widely used in ceramics, paper, paints, and rubber industries.

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Description

Primary Uses
Ceramics Industry

Used as a key raw material in porcelain and fine china production.

Enhances whiteness, strength, and plasticity of ceramic products.

Improves thermal stability and firing characteristics.

Paper Industry

Acts as a coating and filler to improve paper brightness, smoothness, and printability.

Enhances opacity and reduces ink absorbency.

Paints and Coatings

Used as an extender and pigment in paints to improve whiteness and consistency.

Increases durability and resistance to abrasion.

Rubber Industry

Functions as a reinforcing filler to improve tensile strength and wear resistance.

Enhances processing characteristics and reduces production costs.

 

Secondary Uses
Cosmetics

Used as an absorbent and texturizer in powders and facial masks.

Provides a smooth, matte finish.

Plastic and Polymer Industry

Used as a filler to improve mechanical properties and reduce material costs.

Agriculture

Employed as a carrier for pesticides and fertilizers due to its inert nature.

Adhesives and Sealants

Improves viscosity and texture.

PRODUCT KEY FEATURES

Basic Identification Attributes
Chemical Name (IUPAC): Kaolinite (Al2Si2O5(OH)4)

Common/Trade Name: Polywhite B, Chinaclay

CAS Number: 1332-58-7

HS Code: 2507.00.00 (Kaolin and other kaolinic clays)

Synonyms: China clay, Kaolin

 

Physical & Chemical Properties
Physical State: Fine powder

Color: Bright white

Odor: Odorless

Particle Size: Generally less than 2 microns

Specific Gravity: 2.6–2.65

Chemical Composition: Primarily Al₂O₃·2SiO₂·2H₂O (kaolinite)

pH: 4.5–6 (in aqueous suspension)

Moisture Content: Typically <1%

 

Safety & Hazard Attributes
GHS Classification: Not classified as hazardous

Toxicity: Non-toxic; inert material

Dust Hazard: May cause respiratory irritation if inhaled in high concentrations

Carcinogenicity: Not classified as carcinogenic

 

Storage & Handling Attributes
Storage Conditions: Store in a dry, cool place away from moisture

Container Type: Supplied in bags or bulk containers

Shelf Life: Indefinite if stored properly

Handling Precautions: Use dust control measures; wear masks in dusty environments

 

Regulatory & Compliance Attributes
Complies with applicable industrial standards for kaolin clay

Approved for use in cosmetics and food contact applications (subject to purity)

 

Environmental & Health Impact
Biodegradability: Naturally occurring mineral, inert and non-biodegradable

Ecotoxicity: Low environmental impact

Bioaccumulation: Not applicable

Carcinogenicity/Mutagenicity: Not hazardous

SAFETY HANDLING PRECAUTIONS

Safety Handling Precautions
PPE Required: Dust mask, gloves, and eye protection when handling powder

Handling Guidelines: Avoid inhalation of dust; use ventilation and dust extraction

Storage Measures: Keep containers sealed and dry

 

First Aid Measures
Inhalation: Move to fresh air; seek medical attention if respiratory irritation occurs

Skin Contact: Wash with soap and water; no adverse effects expected

Eye Contact: Rinse thoroughly with water; seek medical attention if irritation persists

Ingestion: Not toxic; rinse mouth if ingested accidentally

 

Firefighting Measures
Fire Hazards: Non-flammable

Extinguishing Media: Use standard firefighting procedures for surrounding materials

Special Precautions: None specific to material

Hazardous Combustion Products: None

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