Stannic Oxide (Acid Process)
Specifications
| Item | Index |
| Appearance | Yellowish powder |
| Product granularity | -0.125mm≥98%。 |
Packing& Storage
| Packing | In 25 kg bag | |||||||
| Storage | 20℃, 2 years. | |||||||
| Shipping | Room temperature in China; may vary elsewhere | |||||||
General Information
1.1 Chemical & Physical Properties
| Common Names | Stannic oxide | Tin(IV) oxide | ||||||
| Structure |  |
||||||
| CAS No. | 18282-10-5 | Boiling Point (℃) | 1800-900°C | ||||
| Molecular Weight | 150.69 | Melting Point (℃) | 1127 °C | ||||
| Appearance | Yellowish powder | Vapor Specific Gravity | N/A | ||||
| HS Code | 2825903100 | Flash Point (℃) | 1800-1900°C | ||||
| Solubility | Insoluble in water, alcohol and aqua regia, soluble in sodium hydroxide, potassium hydroxide. | Autoignition Temperature (℃) | N/A | ||||
1.2 Safety Information
| Safety Phrases | S24/25 | |
| RIDADR | UN1993 | |
| WGK Germany | – | |
| Packaging Group | III | |
| Hazard Class | 3 | |
| SYMPTOMS | PREVENTION | FIRST AID | |
| Inhalation | Cough. Sore throat. | Use local exhaust or breathing protection. | Fresh air, rest. |
| Skin | Redness. Burning sensation. Itching. | Protective gloves. | Remove contaminated clothes. Rinse and then wash skin with water and soap. |
| Eyes | Redness. Pain. | Wear safety goggles. | First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. |
| Ingestion | Abdominal pain. Nausea. Vomiting. | Do not eat, drink, or smoke during work. Wash hands before eating. | Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention . |
1.3 Synthetic Route
The metal tin nitric acid oxidation method melts the washed tin ingot, and then slowly pours it into tin flowers with an iron spoon in cold water. Then the tin flower is slowly added to the nitric acid diluted to 20 ° Bé for reaction, waiting until no nitrogen oxide escapes, and there is no tin left, the reaction solution is clarified, the supernatant is sucked out and reused, the generated β-tin acid is rinsed with boiling water, and then washed with deionized water until the iron and heavy metal analysis is qualified, and dehydrated. Dried at 120 °C, calcined at 1250 °C, crushed, and sieved to obtain tin dioxide