Zirconium dioxide

CAS Number
1314-23-4
EC Number
215-227-2

What is Zirconium dioxide?

Zirconium dioxide (CAS 1314-23-4), commercially known as zirconia, is a high-performance inorganic oxide.

Where is Zirconium dioxide used?

  • Coatings and sealants: crosslinking agent and surface hardener, improving scratch resistance and adhesion durability in architectural and industrial finishes
  • Personal care: active odor-control and sweat-inhibiting material in antiperspirant and deodorant products
  • Printing and packaging: enhances abrasion resistance and gloss retention of surface coatings on paper and board substrates
  • Adhesives and elastomers: zirconia-based additives improve thermal stability and bonding performance in high-stress applications
  • It functions as a hardening agent, opacifier, and surface modifier in industrial formulations.

Commercial specifications

  • White powder in varying particle sizes, including nanoscale and micronized grades
  • Purity levels typically range from 99% upward for high-specification applications
  • Stabilized forms, including yttria-stabilized and magnesia-stabilized variants

Other Names (Synonyms)

zirconium(IV) oxide|zirconia|Rhuligel|Zirconium White|Zirconic anhydride|Zirox Zt 35|PCS (filler)|CAP (oxide)|E101

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What are the physical properties of Zirconium dioxide?

Melting Point 2680 °C
Boiling Point 4727 °C
Density 5.68 g/cm³ (solid) (particles)
Flash Point 5000°C
Appearance white powder
Color White
Form powder
Water Solubility insoluble
pH 4-5

Which trade and regulatory codes apply to Zirconium dioxide?

HS Code 28256000
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