Molekula
DL-Methionine
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
DL-Methionine is an essential amino acid used in animal feed, pharmaceuticals, and nutritional supplements to support protein synthesis and metabolic functions. It is available in powder form with a molecular weight of 149.21 g/mol, a CAS number of 59-51-8, and a molecular formula of CH3S(CH2)2CH(NH2)COOH. Stable at ambient storage conditions, it requires no signal word. Molekula supplies DL-Methionine 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
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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1 kg — £67.00 per pack ex VAT · £80.40 inc. VAT
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 to off-white crystal |
| Grade | EP7.0 |
| Identification | IR |
| pH | 5.4 - 6.1 |
| Loss on Drying | 0.5% max |
| Assay | 99 - 101% |
| Sulphated Ash | 0.1% max |
| Related Substances | 0.2% max |
| Lead (Pb) | 20ppm max |
| Sulphates (SO4)(2-) | 200ppm max |
| Chlorine (Cl) | 200ppm max |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 281 °C |
| Boiling Point | 300 to 301 °C at 760 mmHg |
| Density | 1.3 (relative, water = 1) |
| Solubility (other solvents) | Soluble in water; Insoluble in ether |
Source: PubChem CID 876 (Human Metabolome Database (HMDB), ICSC, Joint FAO/WHO Expert Committee on Food Additives (JECFA))
Identification
| Property | Value |
|---|---|
| SKU | 13855549 |
| CAS Number | 59-51-8 |
| IUPAC Name | 2-amino-4-methylsulfanylbutanoic acid |
| EC Number | 200-432-1 |
| Molecular Formula | CH3S(CH2)2CH(NH2)COOH |
| Molecular Weight | 149.21 |
| Exact Mass | 149.051 |
| SMILES | CSCCC(C(=O)O)N |
| InChIKey | FFEARJCKVFRZRR-UHFFFAOYSA-N |
| InChI | InChI=1S/C5H11NO2S/c1-9-3-2-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8) |
| PubChem CID | 876 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 2930400000 |
| Tariff Code | 2930409000 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, 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
- (+-)-Methionine
- 2-amino-4-methylsulfanylbutanoic acid
- Acimetion
- DL-Methioninum
- FEMA No. 3301
- Lobamine
- Methionine, amorphous
- Methionine, DL-
- Racemethionine
- Urimeth
Frequently asked questions
What is DL-Methionine used for?
DL-Methionine is primarily used as a dietary supplement and feed additive to support animal health and growth, and as a source of sulfur in biochemical research.
What is the chemical formula and molecular weight of DL-Methionine?
The formula is C5H11NO2S and the molecular weight is 149.21 g/mol.
How should DL-Methionine be stored?
Store at ambient temperature, protected from moisture and light.
What grade of DL-Methionine is available?
Molekula supplies DL-Methionine in technical grade for industrial and research use.
Can Molekula supply DL-Methionine in bulk?
Yes, Molekula can supply DL-Methionine in bulk quantities; please contact sales for pricing and availability.
What documentation comes with a DL-Methionine order?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS) upon request.
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.