Talcum Powder Coating Grade 800mesh Fine for Paints

Product Definition & Composition
Talcum powder is a naturally derived, ultra-fine white powder composed primarily of hydrated magnesium silicate (Mg₃Si₄O₁₀(OH)₂). This lamellar crystalline mineral undergoes rigorous purification to achieve pharmaceutical-grade quality standards, featuring:

• Purity: ≥98.5% talc content

• Impurities: ≤1.5% (including trace carbonates and chlorites)

• Absence of detectable asbestos fibers (<0.1% by XRD analysis)

Organoleptic Properties

• Visual Characteristics: Snow-white, homogeneous powder

• Tactile Properties: Characteristic greasy/slippery texture

• Olfactory Profile: Completely odorless

• Gustatory Profile: Neutral taste

• Flow Characteristics: Excellent free-flowing properties

Manufacturing Process
 Mineral Processing

• Primary crushing (jaw crushers → 10-20mm granules)

• Secondary milling (roller mills → 100-200μm)

• Hydrochloric acid treatment (5% v/v, 60°C, 2h)

• Triple-stage deionized water washing

• Fluidized-bed drying (110°C, moisture <0.5%)

 Quality Enhancement

• Precision air classification (cut-point adjustment)

• Steam sterilization (pharmaceutical grades)

• Surface modification (for specialty applications)

• Microbiological control (UV treatment)

Physicochemical Properties
 Physical Parameters

• Particle size distribution:

  • D10: 2-5μm

  • D50: 10-25μm

  • D90: 45-60μm

• Specific surface area: 3-8 m²/g (BET)

• Bulk density: 0.35-0.50 g/cm³

• Refractive index: 1.54-1.59

 Chemical Characteristics

• pH (10% suspension): 8.5-10.2

• Solubility profile:

  • Water: <0.1 mg/L

  • Dilute acids (0.1N HCl): 1-3%

  • Alkali solutions (1N NaOH): 2-5%

• Loss on ignition: 4.5-6.0% (1000°C)

Grade Classification System
5.1 Pharmaceutical Grade

• Sterility: <100 CFU/g

• Heavy metals: <10ppm

• Meets USP/EP/JP monographs

• Primary uses: Tablet coating, powder formulations

 Cosmetic Grade

• Whiteness: ≥90% (CIE-L*)

• Particle shape: Platy (aspect ratio >15:1)

• Applications: Body powders, makeup bases

 Food Grade

• Complies with FCC VII standards

• Microbial limits: Salmonella absent/25g

• Uses: Rice polishing, anti-caking agent

 Industrial Grades

Functional Advantages
 Performance Benefits

• Exceptional lubricity (μ=0.05-0.08)

• Thermal stability to 800°C

• Chemical inertness in pH 3-11

• UV light resistance

• Low moisture absorption (<0.5%)

 Technical Merits

• Titanium dioxide extender (15-25% replacement)

• Rheology modifier in suspensions

• Anti-blocking agent in films

• Nucleating agent in crystallizable polymers

Quality Assurance

• ISO 9001:2015 certified production

• Batch-wise certificate of analysis

• Heavy metal screening (Pb, Cd, As, Hg)

• Crystalline silica quantification (<1%)

• Particle size distribution verification

Safety & Regulatory Compliance

• REACH registered

• OECD 402/404 safety tested

• Non-GMO declaration

• Kosher/Halal certification available

• TSCA compliant

Packaging Specifications

• Pharma grade: 25kg PE-lined paper bags

• Food grade: 20kg multi-barrier bags

• Industrial grades: 1MT bulk bags

• Customized packaging solutions

Storage & Handling

• Shelf life: 60 months in original packaging

• Storage conditions: <30°C, <60% RH

• Handling precautions: Use dust control measures

• First-expired-first-out inventory system

Technical Support

• Application development

• Regulatory documentation

• Troubleshooting

• Custom particle engineering

Emerging Applications

• Biodegradable composites

• Cosmetic nanotechnology

• Pharmaceutical DDS

• Advanced ceramics

This technical specification presents talcum powder as a versatile, high-performance mineral offering unmatched functionality across diverse industries. Its unique combination of physical properties, chemical stability, and regulatory compliance makes it indispensable for demanding applications.

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