Talcum Powder Coating Grade 400mesh Ultra Fine

Product Overview
Talcum powder is a naturally occurring mineral product composed primarily of hydrated magnesium silicate (Mg₃Si₄O₁₀(OH)₂). This ultra-fine white powder is characterized by its exceptional smoothness, lubricity, and chemical inertness, making it indispensable across numerous industrial and consumer applications.

Manufacturing Process
 Raw Material Selection

• Sourced from premium talc deposits

• Strict quality control of ore composition

• Removal of accessory minerals

 Production Process

• Primary crushing and grinding

• Hydrochloric acid treatment (5-10% solution)

• Intensive water washing (deionized water)

• Precision drying (120-150°C)

• Air classification and particle size separation

• Sterilization (for pharmaceutical/cosmetic grades)

Physical Characteristics

• Appearance: Snow-white, free-flowing powder

• Particle Size Distribution:

  • D50: 5-25 μm (varies by grade)

  • D90: <50 μm

• Specific Gravity: 2.7-2.8

• Bulk Density: 0.3-0.5 g/cm³

• Mohs Hardness: 1.0 (softest mineral)

• Oil Absorption: 30-50 g/100g

Chemical Properties

• Chemical Formula: Mg₃Si₄O₁₀(OH)₂

• pH Value: 8.5-10.5 (10% aqueous suspension)

• Solubility:

  • Insoluble in water

  • Slightly soluble in dilute mineral acids

  • Partially soluble in concentrated alkalis

• Loss on Ignition: 4-6% (1000°C)

Grade Classification and Specifications
| Grade | Particle Size | SiO₂ Content | MgO Content | Fe₂O₃ Max | Applications |
|-------|--------------|-------------|------------|----------|--------------|
| Pharmaceutical | <10 μm | ≥60% | ≥30% | 0.5% | Tablets, medical powder |
| Cosmetic | 5-15 μm | ≥58% | ≥28% | 0.8% | Makeup, body powder |
| Food | 10-25 μm | ≥55% | ≥25% | 1.0% | Food additives, rice polishing |
| Ceramic | 15-45 μm | ≥50% | ≥20% | 1.5% | Glazes, bodies |
| Industrial | 25-75 μm | ≥45% | ≥18% | 2.0% | Plastics, paints |

Functional Properties
 Physical Attributes

• Exceptional lubricity (coefficient of friction 0.05-0.1)

• High thermal stability (up to 900°C)

• Excellent electrical insulation properties

• Low moisture absorption

• Good UV resistance

 Chemical Attributes

• Chemically inert under normal conditions

• Non-reactive with most organic compounds

• Resistant to microbial growth

• Free from crystalline silica (as confirmed by XRD)

Quality Control Parameters

• Whiteness: ≥90% (ISO brightness)

• Heavy Metals: <10 ppm (pharma/cosmetic grades)

• Microbial Count: <100 CFU/g (for sensitive applications)

• Asbestos Content: Undetectable (verified by TEM)

• Particle Shape: Platy morphology (aspect ratio 10:1 to 20:1)

Industry-Specific Applications
 Pharmaceutical Applications

• Tablet and capsule lubricant

• Topical powder base

• Wound care formulations

• Surgical glove dusting

 Cosmetic Uses

• Body powders

• Makeup formulations (foundation, eyeshadow)

• Deodorant products

• Foot care preparations

 Food Industry

• Rice polishing agent

• Anti-caking additive

• Processing aid (max 2% by FDA)

• Confectionery release agent

 Industrial Applications

• Plastic filler (PP, PE, PVC)

• Paint extender

• Ceramic glaze component

• Rubber processing aid

Safety and Regulatory Compliance

• USP/NF compliance (pharmaceutical grade)

• FDA 21 CFR 73.1550 (cosmetic grade)

• FCC compliance (food grade)

• REACH registered

• OECD GLP safety studies available

Packaging Options

• 25 kg multi-wall paper bags (food/pharma grade with PE liner)

• 50 lb fiber drums (industrial grades)

• 1 metric ton super sacks (with dust containment)

• Custom packaging available

Storage and Handling

• Shelf Life: 36 months in original packaging

• Storage Conditions: Dry environment (<50% RH)

• Temperature Range: 10-30°C

• Handling Precautions: Minimize dust generation

Technical Support Services

• Application development assistance

• Regulatory documentation

• Custom particle size engineering

• Compatibility testing

Emerging Applications

• Biodegradable composites

• Advanced ceramic materials

• Cosmetic nanotechnology

• Pharmaceutical drug delivery systems

Sustainability Profile

• Naturally occurring mineral

• Low energy processing

• Non-toxic and biodegradable

• Recyclable in many applications

Comparative Advantages
| Property | Talc | Alternative Materials |
|----------|------|----------------------|
| Lubricity | Excellent | Good (stearates) |
| Thermal Stability | Up to 900°C | 200-300°C (organics) |
| Cost Efficiency | High | Medium |
| Safety Profile | Excellent | Variable |
| Versatility | Broad | Limited |

This comprehensive technical specification demonstrates talcum powder's unique value proposition as a multifunctional material combining exceptional physical properties with outstanding safety characteristics. Continued innovation in processing and application development continues to expand its utility across traditional and emerging markets.