Molekula
Sodium selenite anhydrous
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Sodium selenite anhydrous is a white, crystalline powder used as a selenium source in biochemical research and nutritional supplements. It is employed in cell culture media and as a reagent in analytical chemistry. It is also used in glass manufacturing to neutralise the green tint from iron impurities, in ceramics and porcelain decoration, and as a bacteriology reagent. Available with CAS number 10102-18-8, molecular formula Na2SeO3, and molecular weight 172.94 g/mol. Stored at ambient temperatures. Hazard classification includes signal word Danger. Molekula supplies Sodium selenite anhydrous from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| Chloride (Cl-) | ≤ 0.1% |
| Assay | ≥ 98.0% |
| Selenate and sulphate | ≤ 0.03% |
| Selenium (Se) | ≥ 45.0% |
| Nitrate (NO3-) | ≤ 0.01% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | I |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White tetragonal crystals |
| Melting Point | 710 °C (decomposes) |
Source: PubChem CID 24934 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 28761535 |
| CAS Number | 10102-18-8 |
| IUPAC Name | disodium;selenite |
| EC Number | 233-267-9 |
| Molecular Formula | Na2SeO3 |
| Molecular Weight | 172.94 |
| Exact Mass | 173.8808 |
| SMILES | [O-][Se](=O)[O-].[Na+].[Na+] |
| InChIKey | BVTBRVFYZUCAKH-UHFFFAOYSA-L |
| InChI | InChI=1S/2Na.H2O3Se/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2 |
| PubChem CID | 24934 |
| UN Number | UN2630 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2842.90.90.50 |
| Tariff Code | 2842901090 |
Safety & GHS
-
Toxic
GHS06
-
Hazardous to the Environment
GHS09
Hazard statements
- EUH031 Contact with acids liberates toxic gas
- H300 Fatal if swallowed
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H330 Fatal if inhaled
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, German, Spanish, French, Italian, Portuguese, Arabic, Dutch.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Disodium selenite
- Disodium selenium trioxide
- H2-O3-Se.1/2Na
- Natriumselenit
- Pleo selene
- Selenious acid (H2SeO3), disodium salt
- Selenious acid, disodium salt
- Selenious acid, sodium salt (1:2)
- Selenite sodium
- SODIUM SELENITE
Frequently asked questions
What is sodium selenite anhydrous used for?
It is primarily used as a selenium source in nutritional supplements, animal feed, and laboratory research.
What is the chemical formula and molecular weight of sodium selenite anhydrous?
The formula is Na2SeO3 and the molecular weight is 172.94 g/mol.
How should sodium selenite anhydrous be stored?
It should be stored at ambient temperature in a dry, well-ventilated area.
What grade is available for sodium selenite anhydrous?
Available in reagent grade and research grade; specific grades may vary by order size.
Can Molekula supply sodium selenite anhydrous in bulk?
Yes, Molekula can supply sodium selenite anhydrous in bulk quantities—please contact sales for details.
What documentation comes with a purchase of sodium selenite anhydrous?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.