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
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
WGK Germany
Packaging Group III
Hazard Class 3


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