Sodium selenite pentahydrate
| Produktname | Sodium Selenite Pentahydrate |
|---|---|
| CAS-Nummer | 26970-82-1 |
| Molekülformel | Na2SeO3·5H2O |
| Molekulargewicht | 263.01 g/mol (anhydrous basis: 172.94 g/mol) |
| Aussehen | White crystalline powder or colorless crystals |
| Assay | ≥98.0% (titration) |
| Selenium Content | ≥30.0% (calculated on dried basis) |
| Trocknungsverlust | 32.0–36.0% (water of crystallization) |
| Löslichkeit | Freely soluble in water; insoluble in ethanol |
| Schwermetalle | ≤ 10 ppm |
| Verpackung | 25 kg fiber drum with inner polyethylene bag |
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Synonyms: Sodium selenite pentahydrate, Disodium selenite pentahydrate, Selenious acid disodium salt pentahydrate, Sodium selenium oxide pentahydrate, Na2SeO3·5H2O
Sodium selenite pentahydrate is the hydrated, inorganic form of sodium selenite, a selenium(IV) salt that appears as white, water-soluble crystals. It is manufactured by reacting selenium dioxide with sodium hydroxide under controlled conditions, followed by crystallization to yield the pentahydrate. The material is supplied as a high-purity grade suitable for pharmaceutical, nutraceutical and veterinary applications.
As a highly bioavailable source of selenium, it serves as a critical trace element in total parenteral nutrition (TPN) formulations, dietary supplements, and animal feed premixes. Its well-defined stoichiometry and rapid dissolution profile make it a preferred choice for formulators who require precise selenium dosing and consistent analytical behavior.
| Parameter | Technische Daten |
|---|---|
| Assay (as Na2SeO3·5H2O) | ≥98,01 TP3T |
| Selenium (Se) content | ≥30.0% (dried basis) |
| Aussehen | White crystalline powder |
| Loss on drying | 32.0–36.0% |
| Heavy metals | ≤ 10 ppm |
| Wasserlöslichkeit | Freely soluble |
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