Selenium
Selenium: pellets, 5N (99.999%), 25 g and 50 g lots. Producer certificate of analysis per lot.
CAS 7782-49-2 | Formula Se | MW 78.97
Grades and prices
| Code | Product | Grade | Pack | Price | |
|---|---|---|---|---|---|
| BM-SE-5N-25G | Selenium pellets | 5N (99.999%) | 25 g | $49 | Request quote |
| BM-SE-5N-50G | Selenium pellets | 5N (99.999%) | 50 g | $79 | Request quote |
| BM-ZNSE-10G | Zinc selenide, polycrystalline (ZnSe) | Lot-specific, CoA on request | 10 g | $79 | Request quote |
| BM-SE-Q | Selenium, other grades and sizes | By quote | By quote | By quote | Request quote |
Specifications
| Property | Value |
|---|---|
| Assay | 5N (99.999%) |
| Assay documentation | Producer certificate of analysis for the specific lot, available on request |
| Form | pellets |
| Appearance | grey pellets |
| Melting point | 221 °C (lit.) |
| Boiling point | 685 °C (lit.) |
| Density | 4.81 g/cm3 (lit.) |
Typical applications
CIGS absorber layers are formed by selenization of Cu-In-Ga precursor films, where the selenium vapor source sets the impurity background of the finished cell. The same 5N pellets dissolve in trioctylphosphine for hot-injection CdSe quantum dot synthesis, and melt with arsenic or germanium for As-Se and Ge-Se chalcogenide glasses used in infrared optics.
In thermoelectrics, n-type bismuth telluride is alloyed toward Bi2Te3-xSex, commonly near x = 0.3, for room-temperature modules. Tin selenide crystals grown from 5N feedstock have reported zT values near 2.6 along the b axis at 923 K; the carrier concentration such a crystal actually reaches traces back to the purity of the selenium charge.
In metallurgy, Type 303Se stainless and selenium-copper alloys use fractional-percent selenium additions for machinability, and glassmakers use selenium as a decolorizer against iron tint. Gram-scale lots suit alloy development and doping studies where a producer drum is impractical.
Packaging
Pellets are packed in sealed polyethylene bottles inside padded cartons. Each label carries the product code, lot number, net weight and grade. In-stock lots typically dispatch within 2 business days.
Safety and transport
Selenium and its compounds are toxic. Handle with standard laboratory controls. Full GHS classification and handling guidance in the SDS, available on request before or after purchase.
Solid elemental selenium, tellurium, bismuth and indium are not regulated for transport. Powders, compounds and international air shipments are reviewed before dispatch.