Ammonium fluozirconate is a key component in next-generation chrome-free conversion coatings for aluminium and steel. As environmental regulations tighten globally, zirconium-based surface treatments are replacing chromate processes.
Safety Data Sheet (SDS) available on request. Contact us for regulatory documentation.
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✉ Contact Sales 💬 WhatsAppAmmonium hexafluorozirconate, formula (NH4)2ZrF6, formula weight 241.21 g/mol. White crystalline solid, monoclinic crystal system. Density 2.45 g/cm3. Decomposes above 350°C, releasing ammonia and HF. Solubility in water approximately 27 g/100mL at 25°C. The ZrF6 2- anion is octahedral and coordinatively saturated.
Conversion-coating grade conforms to internal specifications of major automotive paint-shop chemical suppliers. Reference industry standards: ASTM D5894 (cyclic salt fog/UV exposure for paint pretreatment), ISO 12944 (corrosion protection by paint systems). Pharmacopeial grades not commonly specified. Nuclear-grade variants with controlled hafnium content (< 100 ppm) available on dedicated production runs.
CAS 16919-31-6. UN 2923 — Class 8 (Corrosive), PG III. GHS pictograms: GHS05 (corrosive), GHS07 (harmful). REACH registered (EC 240-973-0). TSCA listed. Releases ammonia and HF on thermal decomposition — important for thermal-process design and ventilation requirements. RoHS — zirconium compounds are not restricted.
| Grade | Typical Specification | Common Use |
|---|---|---|
| Industrial | 95-98% | Automotive pretreatment, conversion coating |
| Standard Hf | Hf 1-2% | General industrial use |
| Nuclear-Grade | Hf < 100 ppm | Nuclear research feedstock |
| Custom Particle Size | Application-specific | Specific bath formulators |
For peer-reviewed property data, regulatory listings, and structure verification: