Tellurium
HS code: 2804509000
CAS: 13494-80-9
EC: 236-813-4
Chemical element: Te
Purity: 99.3% | 99.7% | 99,95% | 99,999
Appearance: powder and bars
Color:: Silver Gray Metal
Worldwide delivery
CHEMICAL COMPOSITION
| Elements | Mass fraction, % | |||||
| Т–U | Т1 | Т–sТ | Т–sCh | Т–sМ | ||
| Te | Tellurium, minimum | 99.95 | 99.3 | 99.985 | 99.999 | 99.7 |
| Impurities, max: | ||||||
| Se | Selenium | 0.04 | 0.1 | 0.014 | Not standardized | 0.02 |
| Pb | Lead | 0.001 | 0.1 | 0.0001 | 0.00006 | 0.001 |
| Cu | Copper | 0.003 | 0.05 | 0.0002 | 0.00002 | 0.002 |
| S | Sulfur | 0.005 | 0.04 | – | – | 0.02 |
| Na | Sodium | 0.004 | 0.05 | 0.004 | – | 0.01 |
| Si | Silicon | 0.002 | 0.05 | 0.002 | – | 0.002 |
| Al | Aluminum | 0.001 | 0.04 | 0.00025 | 0.00005 | 0.002 |
| Fe | Iron | 0.001 | 0.1 | 0.0002 | 0.00005 | 0.002 |
| Ag | Silver | – | – | 0.0002 | 0.00002 | – |
| As | Arsenic | – | – | – | 0.0001 | – |
| Ni | Nickel | – | – | 0.0001 | 0.00005 | – |
Notes:
- Mass fraction of tellurium except T1 grade is determined as 100% less overall mass fractions of standardized impurities.
- Mass fraction of silica and sodium in T-sT tellurium as well as sulfur in T-U tellurium is controlled by the manufacturing technology within standard process parameters and is defined from time to time at the customer’s request.
- Mass fraction of cadmium, arsenic, mercury, tin, chromium, gallium, indium, cobalt, bismuth, magnesium, manganese, antimony in T-sCh tellurium is controlled by the manufacturer’s technology within standard process parameters and is defined from time to time at the customer’s request.
- Mass fraction of selenium in T-sCh tellurium is defined but not standardized.
- Sulfur T-U tellurium and silica and sodium in T-sT tellurium are disregarded when calculating the number and total amount of standardized impurities.
GUARANTEED STORAGE PERIOD
The storage period of powdered tellurium is 7 years since the date of production, and it is unlimited for tellurium bars.
