Zinc powder
| Chemical formula | Zn |
| Density | 7.14 g/cm3 |
| Molar mass | 65.37 g/mol |
| HS Code | 79039000 |
| CAS number | 7440-66-6 |
| Storage | without limitations |
| EC number | 231-175-3 |
| SDS | available |
| RTECS | ZG8600000 |
| R phrase | R 50/53 |
| S phrase | S 60-61 |
| Odour | odourless |
| Form | solid |
| Color | grey |
| Ignition temperature | 460 °C |
| Solubility in water | insoluble (20°c) |
| Melting point | 420 °C |
| Assay | ≥ | 95 | % |
| Description | Conforms | ||
| Identification | Conforms | ||
| Solubility | Conforms | ||
| Arsenic | ≤ | 0.0001 | % |
| Substances insoluble in HCl | ≤ | 0.1 | % |
| Cadmium | ≤ | 0.05 | % |
| Copper | ≤ | 0.005 | % |
| Iron | ≤ | 0.005 | % |
| Lead | ≤ | 0.005 | % |
| Tin | ≤ | 0.001 | % |
Zinc powder is a fine, grayish metallic powder consisting of elemental zinc particles. It is widely used in laboratories and pharmaceutical formulations as a reducing agent, catalyst, and in various chemical syntheses.
🏭⚗️ Production
Zinc powder is produced by atomization of molten zinc, electrolysis, or reduction of zinc compounds. It is purified and classified by particle size to meet specific industrial or laboratory standards.
🔬 Properties
The chemical symbol is Zn with an atomic mass of 65.38 g/mol. Zinc powder appears as a fine, lustrous gray powder that is insoluble in water but reacts with acids to release hydrogen gas. It has good reducing properties and moderate reactivity with oxygen.
🧪 Applications
In laboratories, zinc powder is used as a reducing agent in organic and inorganic synthesis, for example in the reduction of aldehydes and ketones. It is also used in pharmaceutical formulations, in galvanization, and as an additive in dietary supplements for zinc supplementation.
⚠️ Safety
Zinc powder is generally considered safe but fine particles can be flammable and pose inhalation risks. It may cause mild irritation to skin, eyes, and respiratory tract. Proper protective equipment such as gloves, goggles, and dust masks should be used when handling. It should be stored in a cool, dry place away from oxidizing agents and sources of ignition.
