Potassium Fluorosilicate Cas 16871-90-2

Chemical Name: Potassium fluorosilicate
Synonyms: Potassium hexafluorosilicate; potassium silicofluoride
CAS No.: 16871-90-2
Molecular Fomula: F6K2Si

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Potassium Fluorosilicate (CAS 16871-90-2) Comprehensive Technical Guide

1. Product Specifications & Comparative Analysis

Parameter Industrial Grade (98%) Premium Grade (99.9%)
Chemical Formula K2SiF6
Molecular Weight 220.26 g/mol
Appearance White crystalline powder
Density 2.665 g/cm³ 2.68 g/cm³
Hydrofluoric Acid (HF) ≤0.1% ≤0.05%
Moisture Content ≤0.5% ≤0.2%
Melting Point Decomposes at 500°C Decomposes at 530°C

2. Industrial Applications & Functional Mechanisms

Core Functional Areas:

  • Metallurgy: Acts as flux in aluminum/magnesium smelting to lower melting points and remove impurities.
  • Glass Manufacturing: Key component for producing potassium-enriched optical glass (refractive index: 1.399) and opaque glass surfaces.
  • Wood Preservation: 0.5-1.5% concentration solutions penetrate timber structures, inhibiting fungal growth.
  • Ceramic Production: Forms durable glaze coatings at 800-1,100°C firing temperatures.
  • Agrochemicals: Intermediate in fluoride-based insecticide synthesis.

3. Operational Guidelines & Safety Protocols

Critical Safety Data:

  • Oral Toxicity (Rat LD50): 500 mg/kg
  • Permissible Exposure Limit (OSHA): 2.5 mg/m³

Protective Measures:

  • Mandatory PPE: NIOSH-approved N95 respirators, chemical-resistant gloves (≥0.4mm), and polycarbonate goggles
  • Ventilation Requirements: Local exhaust ventilation maintaining ≤30% LEL

4. Practical Implementation Case Studies

Case 1: Optical Glass Enhancement

Challenge: Achieve refractive index >1.45 for specialized lenses
Solution: 18% K2SiF6 integration in glass matrix
Outcome: 22% light transmission improvement with 1.473 RI

5. Client Success Stories

Shandong Xuchen Chemical Technology

Application: Magnesium alloy production
Implementation: 0.8% flux addition reduced slag formation by 40%
Economic Benefit: ¥3.2M/year operational cost reduction

6. Technical Consultation & Quotation

For customized specifications or bulk pricing:
Email: info@vivalr.com
Tel: (86) 15866781826

Provide: Required purity level, packaging specifications (25kg bags/drums), and application details for optimized formulation guidance.

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