Kaolin

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Kaolin is a naturally occurring, fine white clay mineral primarily composed of kaolinite. It features a soft, powdery texture and excellent absorbency. Kaolin is widely used across ceramics, paper, rubber, paint, and cosmetics industries due to its chemical inertness, whiteness, and plasticity. It acts as a filler, coating agent, and extender to enhance product quality and performance.

Description

Kaolin

 Primary Uses 

  1. Ceramics Industry

  • Key raw material for porcelain and fine china production due to whiteness and plasticity.
  • Acts as binder and filler in sanitary ware and earthenware.
  1. Paper Industry

  • Coating and filling agent to improve brightness, smoothness, and printability of paper.
  • Enhances opacity and reduces ink consumption.
  1. Rubber and Plastics

  • Filler that improves mechanical strength, durability, and abrasion resistance.
  • Cost-effective extender in rubber and plastic products.
  1. Paints and Coatings

  • Extender pigment to improve opacity, brightness, viscosity, and texture of paints.
  • Enhances stability and consistency of coatings.
  1. Cosmetics and Personal Care

  • Absorbent and anti-caking agent in powders, facial masks, and skincare products.
  • Provides smooth, silky feel in cosmetic formulations.

 

Secondary Uses

  1. Pharmaceutical Industry
  • Inactive ingredient and excipient in tablets and powders.
  • Adsorbent for toxins and irritants.
  1. Agriculture

  • Carrier for pesticides and insecticides.
  • Soil conditioner to improve texture and water retention.
  1. Environmental Applications

  • Flocculant in wastewater treatment for impurity removal.
  • Absorbent in spill cleanup.
  1. Paper Recycling

  • Improves fiber bonding and sheet formation in recycled paper.
PRODUCT KEY FEATURES
  1. Basic Identification Attributes
  • Chemical Name (IUPAC): Hydrated aluminum silicate (kaolinite)
  • Common/Trade Name: Kaolin; China Clay
  • Synonyms: Kaolinite; White Clay; China Clay; Porcelain Clay; Hydrated Aluminosilicate
  • CAS Number: 1332-58-7
  • HS Code: 2507.00.00
  1. Physical & Chemical Properties
  • Physical State: Fine powder or granular
  • Color & Odor: White to off-white; odorless
  • Particle Size: Typically less than 10 microns
  • Moisture Content: Usually below 5%
  • pH: Slightly acidic to neutral (4-6)
  • Solubility: Insoluble in water

 

  1. Safety & Hazard Attributes
  • GHS Classification: Not hazardous under normal handling
  • Toxicity: Non-toxic; food-grade kaolin available
  • Exposure Limits: OSHA PEL for nuisance dust applies

 

  1. Storage & Handling Attributes
  • Storage Conditions: Store in dry, ventilated area, protected from moisture
  • Container Type: Bulk bags, sacks, or silos with moisture protection
  • Shelf Life: Indefinite if stored properly
  • Handling Precautions: Avoid dust generation and inhalation

 

  1. Regulatory & Compliance Attributes
  • Complies with FDA and cosmetic-grade standards where applicable
  • Meets specifications for industrial and food-grade kaolin
  • Proper labeling for dust hazards required

 

  1. Environmental & Health Impact
  • Biodegradability: Naturally occurring mineral; environmentally safe
  • Ecotoxicity: Low environmental impact; inert
  • Bioaccumulation: Not applicable
  • Carcinogenicity/Mutagenicity: Not classified; prolonged dust inhalation may cause respiratory irritation
SAFETY HANDLING PRECAUTIONS
  1. Safety Handling Precautions
  • PPE Required: Dust mask or respirator, gloves, and eye protection for large quantities
  • Handling Guidelines: Use dust extraction and proper ventilation
  • Storage Measures: Keep containers sealed and dry

 

  1. First Aid Measures
  • Inhalation: Move to fresh air; seek medical attention if irritation occurs
  • Skin Contact: Wash with soap and water if irritation develops
  • Eye Contact: Rinse eyes thoroughly; seek medical help if irritation persists
  • Ingestion: Not toxic; seek medical advice if large amounts ingested

 

  1. Firefighting Measures
  • Fire Hazards: Non-flammable and non-combustible
  • Extinguishing Media: Use appropriate media for surrounding fire
  • Special Precautions: Avoid dust cloud formation which may be explosive
  • Hazardous Combustion Products: None from kaolin itself