Molekula
L-(+)-Selenomethionine (Low Se)
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
L-(+)-Selenomethionine (Low Se) is an organic selenium compound and a methionine analog used primarily as a selenium supplement in nutritional research, animal feed, and biochemical studies. It provides bioavailable selenium while maintaining methionine’s metabolic role. Catalogue details: CAS 3211-76-5, molecular formula C5H11NO2Se, molecular weight 196.11 g/mol. Store at -15 to -20°C. Signal word: Danger. Molekula supplies L-(+)-Selenomethionine (Low Se) 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.
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Specifications
| Property | Value |
|---|---|
| Appearance | Off white to light yellow powder |
| Heavy metals | ≤20.00 mg/kg |
| Total plate count | ≤1000cfu/g |
| Loss on Drying | ≤7% |
| Odour | Characteristic |
| Residual Solvents | Negative |
| DDT | ≤0.1 mg/kg |
| Arsenic (As) | ≤0.2 mg/kg |
| E. Coli | Negative |
| Selenium (Se) | ≥2000ppm |
| Mould & Yeast | ≤1000cfu/g |
| Organic Residue | Negative |
| Phosphate organics | Negative |
| L-Sukforaphance | ≥5000ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | -15 to -20 °C |
| Flash Point | 100 °C |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 275 °C |
Source: PubChem CID 105024 (Human Metabolome Database (HMDB))
Identification
| Property | Value |
|---|---|
| SKU | 90031000 |
| CAS Number | 3211-76-5 |
| IUPAC Name | (2S)-2-amino-4-methylselanylbutanoic acid |
| Molecular Formula | C5H11NO2Se |
| Molecular Weight | 196.11 |
| Exact Mass | 196.9955 |
| SMILES | C[Se]CC[C@@H](C(=O)O)N |
| InChIKey | RJFAYQIBOAGBLC-BYPYZUCNSA-N |
| InChI | InChI=1S/C5H11NO2Se/c1-9-3-2-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8)/t4-/m0/s1 |
| PubChem CID | 105024 |
| UN Number | UN3283 |
| REACH Code | Y110 |
| HTS Code | 29319000 |
| Tariff Code | 2931900090 |
Safety & GHS
-
Toxic
GHS06
-
Serious Health Hazard
GHS08
-
Hazardous to the Environment
GHS09
Hazard statements
- H301 Toxic if swallowed
- H331 Toxic if inhaled
- H373 May cause damage to organs through prolonged or repeated exposure
- H400 Very toxic to aquatic life
- 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
- P284 Wear respiratory protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P304+312 IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
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
- (2S)-2-amino-4-(methylseleno)butanoic acid
- (2S)-2-amino-4-methylselanylbutanoic acid
- (2S)-2-azaniumyl-4-methylselanylbutanoate
- (S)-2-Amino-4-(methylselanyl)butanoic acid
- L-selenomethionine
- L-Selenomethioninum
- Selenium-L-methionine
- Seleno-L-methionine
- Selenomethionine-L
- SeMet
Frequently asked questions
What is L-(+)-Selenomethionine (Low Se) used for?
L-(+)-Selenomethionine (Low Se) is primarily used as a selenium supplement in nutritional research, animal feed, and as a reagent in biochemical studies for protein labeling and metabolic research.
What is the chemical formula and molecular weight of L-(+)-Selenomethionine (Low Se)?
The chemical formula is **C5H11NO2Se**, and the molecular weight is **196.11 g/mol**.
How should L-(+)-Selenomethionine (Low Se) be stored?
Store at **-15 to -20°C** to maintain stability and prevent degradation.
What grades or purities of L-(+)-Selenomethionine (Low Se) does Molekula supply?
Molekula supplies **Low Selenium (Low Se) grade**, which is optimized for controlled selenium content in applications requiring precise dosing.
Can Molekula supply L-(+)-Selenomethionine (Low Se) in bulk quantities?
Yes, Molekula can provide **bulk quantities** of L-(+)-Selenomethionine (Low Se) upon request, subject to availability and order specifications.
What documentation comes with an order of L-(+)-Selenomethionine (Low Se)?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability and compliance.
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