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Polywhite B
Polywhite B Chinaclay, 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.
Polywhite B (Chinaclay)
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.
- Improves viscosity and texture.
1. 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
2. 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%
3. 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
4. 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
5. Regulatory & Compliance Attributes
- Complies with applicable industrial standards for kaolin clay
- Approved for use in cosmetics and food contact applications (subject to purity)
6. 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
- 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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