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 1999 · 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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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 | 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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
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.
Is L-(+)-Selenomethionine (Low Se) dangerous goods for shipping?
Yes. L-(+)-Selenomethionine (Low Se) ships as dangerous goods: UN3283, class 6.1, packing group III.
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