Molekula
L-Arginine
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-Arginine is a semi-essential amino acid involved in nitrogen metabolism, urea cycle regulation, and nitric oxide synthesis. It is used in nutritional supplements, pharmaceuticals, and research applications. Available in powder form with a purity of ≥98%, CAS number 74-79-3, molecular formula C6H14N4O2, and molecular weight 174.20 g/mol. Store at ambient temperature. Signal word: Warning. Molekula supplies L-Arginine 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.
Often bought together
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 — $168.40 per pack
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 crystals or crystalline powder |
| Loss on Drying | ≤ 0.5% |
| Chromatographic purity | Not more than 0.5% of any individual impurity is found ； Not more than 2.0% of total impurities is found |
| Chloride (Cl-) | ≤ 0.05% |
| Assay | 98.5 - 101.5% |
| Residue on Ignition | ≤ 0.3% |
| Heavy Metals (Pb) | ≤ 0.0015% |
| Iron (Fe) | ≤ 0.003% |
| Identification (IR) | Conforms to reference |
| Sulphates (SO4)(2-) | ≤ 0.03% |
| Specific Rotation [ɑ] D25 | +26.3 to +27.7 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 244 °C |
| Water Solubility | 182 g/L at 25 °C |
| Solubility (other solvents) | Insoluble in ethyl ether; slightly soluble in ethanol |
| pKa | pKa = 2.24 (at 0 °C) |
| log P (octanol/water) | -4.20 |
Source: PubChem CID 6322 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 28411569 |
| CAS Number | 74-79-3 |
| IUPAC Name | (2S)-2-amino-5-(diaminomethylideneamino)pentanoic acid |
| EC Number | 200-811-1 |
| Molecular Formula | C6H14N4O2 |
| Molecular Weight | 174.20 |
| Exact Mass | 174.1117 |
| SMILES | C(C[C@@H](C(=O)O)N)CN=C(N)N |
| InChIKey | ODKSFYDXXFIFQN-BYPYZUCNSA-N |
| InChI | InChI=1S/C6H14N4O2/c7-4(5(11)12)2-1-3-10-6(8)9/h4H,1-3,7H2,(H,11,12)(H4,8,9,10)/t4-/m0/s1 |
| PubChem CID | 6322 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29252900 |
| Tariff Code | 2925290090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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-5-(diaminomethylideneamino)pentanoic acid
- (S)-2-Amino-5-guanidinopentanoic acid
- 2-amino-5-guanidinovaleric acid
- Arginina
- arginine
- ARGININE, L-
- Argininum
- L-alpha-Amino-delta-guanidinovaleric acid
- L-Arg
- L-Arginin
Frequently asked questions
What is L-Arginine used for?
L-Arginine is commonly used in biochemical research, cell culture media, and as a dietary supplement to support cardiovascular and immune health.
What is the chemical formula and molecular weight of L-Arginine?
The formula is C6H14N4O2 with a molecular weight of 174.20 g/mol.
How should L-Arginine be stored?
Store at ambient temperature, protected from moisture and light.
What grade of L-Arginine does Molekula supply?
Molekula supplies L-Arginine in reagent grade, suitable for laboratory and research applications.
Can Molekula supply L-Arginine in bulk?
Yes, Molekula can supply L-Arginine in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with an order of L-Arginine?
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.