​Zinc Chloride Anhydrous (ZnCl₂)

Zinc Chloride Anhydrous (ZnCl₂)

Zinc Chloride Anhydrous is a white, highly water-soluble inorganic compound. It is widely used as a Lewis acid catalyst in organic synthesis and various industrial applications.

1. Key Physical & Chemical Properties

- Basic Information:

- CAS Number: 7646-85-7

- Molecular Weight: 136.3 g/mol

- Appearance: White crystalline solid or AnhydroBeads™.

- Physical Data:

- Melting Point: Approx. 290°C - 318°C (varies by crystal form)

- Boiling Point: 732°C

- Density: 2.91 g/cm³

- Solubility: Very soluble in water (exothermic), alcohol, glycerol, and acetone.

- Chemical Characteristics:

- Hygroscopic: Highly deliquescent (absorbs moisture from air and may become liquid).

- Acidity: Aqueous solutions are strongly acidic due to hydrolysis.

2. Major Applications

-Organic Synthesis Catalyst: A common Lewis acid used in Friedel-Crafts acylation, indole cyclization, and as a condensing agent.

- Industrial Uses:

- Wood preservative

- Soldering flux (dissolves metal oxides)

- Sizing agent and mordant in textile processing

- Batteries & Metallurgy: Used in battery electrolytes and metal surface treatment.

3. Safety & Hazards (GHS Classification)

- Primary Hazards:

- Corrosive: Causes severe skin burns and eye damage.

- Aquatic Toxicity: Very toxic to aquatic life with long-lasting effects.

- Acute Toxicity: Harmful if swallowed.

- Hazard Statements: H314 (Causes severe skin burns and eye damage), H411 (Toxic to aquatic life with long-lasting effects).

- Precautionary Measures:

- Handling: Use in a fume hood. Avoid dust formation. Wash thoroughly after handling.

- Storage: Keep tightly sealed in a dry place to prevent deliquescence.

- First Aid:

- Skin contact: Remove contaminated clothing and rinse with plenty of water for at least 15 minutes.

- Inhalation: Move to fresh air. Seek medical attention if discomfort persists.

4. Available Purity Grades

-Reagent Grade (≥98%): Suitable for general laboratory synthesis and industrial use.

-High Purity Grade (99.99%+): Used in materials science (e.g., synthesis of zinc oxide thin films) and electronics.

Summary

Anhydrous Zinc Chloride,CAS Number: 7646-85-7 is a fundamental industrial chemical. Due to its strong hygroscopicity and acidity, proper protective equipment is essential during handling, and it must be stored in airtight, dry conditions.

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