CAS 7699-43-6 corresponds to zirconium oxychloride (also known as dichlorooxide zirconium or chlorooxide zirconium), with the chemical formula typically referring to the anhydrous form ZrOCl₂ (molecular weight 178.13). The industrially common form is the octahydrate ZrOCl₂·8H₂O, serving as a core inorganic intermediate for the preparation of various zirconium compounds.

Basic Information
- Chinese Name: Zirconium oxychloride (Alternative Names: Dichlorooxygen zirconium, Chlorooxide zirconium)
- English name: Zirconyl chloride / Zirconium oxychloride
CAS Number: 7699-43-6
EINECS No.: 231-717-9
- Molecular formula: ZrOCl₂ (anhydrous); the common octahydrate is ZrOCl₂·8H₂O
- Molecular weight: 178.13 (anhydrous); 322.25 (octahydrate)
- Appearance: The anhydrous form is theorized to be crystalline; industrial products are mostly white to light yellow needle-like/filamentous crystals or moist solids, prone to deliquescence, with strongly acidic aqueous solutions
Density: approximately 1.344 g/mL (solution/wet state reference); octahydrate crystal density approximately 2.49 g/cm³
- Melting point: Data varies for the anhydrous form (some labeled as -15°C actually refers to decomposition or dehydration of hydrates); the octahydrate loses partial crystalline water when heated to 150°C and completely dehydrates at 210°C
- Solubility: Soluble in water, methanol, and ethanol; slightly soluble in hydrochloric acid; insoluble in ether and most non-polar organic solvents

main purpose
1. Raw materials for zirconium compound synthesis: calcination to produce zirconium dioxide (ZrO₂), followed by derivation to prepare zirconium carbonate, zirconium sulfate, zirconium nitrate, zirconium hydroxide, and others
2. Industrial Additives: Oilfield Formation Mud Stabilizer, Rubber Additive, Coatings/Paint Drying Agent (Drier)
3. Material Processing: Ceramics, glazes, fiber treatment agents, refractory material components
4. Environmental Protection and Others: Flocculation treatment of papermaking wastewater, mordants, color fixatives, flame retardant additives, leather tanning agents, etc

Safety and Storage
- Hazard characteristics: Corrosive, exothermic upon contact with water and generates acidic fumes; poses risk of irritation/irreversible damage to eyes, skin, and respiratory tract (GHS classification includes corrosive/irritant categories)
- Operation Protection: Operate in a well-ventilated area, wear anti-corrosion gloves, goggles, and protective clothing; avoid inhaling dust or aerosols
- Storage conditions: Store in airtight containers in a cool, dry, and well-ventilated place, away from water sources, strong oxidizers, and alkali metals; prevent moisture absorption and deliquescence

Note: CAS 7699-43-6 strictly corresponds to the anhydrous formula ZrOCl₂, but commercially available “zirconium oxychloride” is mostly a solid containing crystalline water (especially the octahydrate). When purchasing, it is necessary to distinguish specifications (such as zirconium content percentage and hydration state).

Products :

CAS 7699-43-6 | Zirconium Oxychloride 36% (Zirconyl chloride)
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