L-Ornithine
- CAS No.
- 70-26-8
- Chemical Name:
- L-Ornithine
- Synonyms
- ORNITHINE;H-Orn-OH;2,5-diaminopentanoic acid;Arginine EP Impurity C;Ornithine Phenylacetate;(S)-2,5-Diaminovaleric acid;(2S)-2,5-Diaminopentanoic acid;L-ORNITHINE;vL-Ornithine;laevo-ornithine
- CBNumber:
- CB2199856
- Molecular Formula:
- C5H12N2O2
- Molecular Weight:
- 132.16
- MDL Number:
- MFCD00242584
- MOL File:
- 70-26-8.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | 140°C |
|---|---|
| Boiling point | 244.08°C (rough estimate) |
| alpha | D25 +11.5° (c = 6.5) |
| Density | 1.1740 (rough estimate) |
| refractive index | 1.4496 (estimate) |
| storage temp. | under inert gas (nitrogen or Argon) at 2–8 °C |
| solubility | Water: 50 mg/mL (378.33 mM); DMSO: < 1 mg/mL (insoluble or slightly soluble) |
| pka | 1.705(at 25℃) |
| form | Solid |
| color | White to off-white |
| PH | 9.70 |
| optical activity | +12.125 (H2O) +28.425 (5 mol dm-3 HCl) |
| Cosmetics Ingredients Functions | SKIN CONDITIONING |
| InChI | InChI=1S/C5H12N2O2/c6-3-1-2-4(7)5(8)9/h4H,1-3,6-7H2,(H,8,9)/t4-/m0/s1 |
| InChIKey | AHLPHDHHMVZTML-BYPYZUCNSA-N |
| SMILES | C(O)(=O)[C@H](CCCN)N |
| LogP | -4.220 |
| CAS DataBase Reference | 70-26-8(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | E524N2IXA3 |
| EPA Substance Registry System | L-Ornithine (70-26-8) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|---|---|
| Signal word | Warning |
| Hazard statements | H302-H315-H319-H335 |
| Precautionary statements | P261-P305+P351+P338 |
| TSCA | TSCA listed |
| Toxicity | sce-hmn-lym 10 mg/L MUREAV 372,75,1996 |
| REACH Registrations | Active |
L-Ornithine price
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| ChemScene | CS-4817 | L-Ornithine ≥98% | 70-26-8 | 1g | $122 | 2026-06-04 | Buy |
| ChemScene | CS-4817 | L-Ornithine ≥98% | 70-26-8 | 5g | $485 | 2026-06-04 | Buy |
| ChemScene | CS-4817 | L-Ornithine ≥98% | 70-26-8 | 25g | $1321 | 2026-06-04 | Buy |
| ApexBio Technology | B8919 | L-Ornithine | 70-26-8 | 500mg | $79 | 2026-05-06 | Buy |
| Ambeed | A329366 | L-Ornithine 98% | 70-26-8 | 100mg | $27 | 2026-06-05 | Buy |
L-Ornithine Chemical Properties,Uses,Production
Chemical Properties
It is a white solid, but as it does not crystallise readily, it is usually found in a paste-like form. It is readily soluble in water and ethanol, sparingly soluble in diethyl ether, and its solution is alkaline.
Occurrence
Ornithine is found in many foods, including fish, dairy products and pulses. Sardines, salmon and herring are particularly good sources.
Uses
hepatoprotectant, anticholesteremic
Definition
ChEBI: L-ornithine is an optically active form of ornithine having L-configuration. It has a role as a hepatoprotective agent, a mouse metabolite and an algal metabolite. It is an ornithine and a non-proteinogenic L-alpha-amino acid. It is a conjugate base of a L-ornithinium(1+). It is a conjugate acid of a L-ornithinate. It is an enantiomer of a D-ornithine.
Synthesis Reference(s)
Canadian Journal of Chemistry, 31, p. 1060, 1953 DOI: 10.1139/v53-139
Safety Profile
Mutation data reported. When heated to decomposition it emits toxic vapors of NOx.
Purification Methods
Crystallise L-ornithine from water containing 1mM EDTA (to remove metal ions). [Perrin J Chem Soc 3125 1958, Rivard Biochemical Preparations 3 97 1955, Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 pp 2477-2491 1961, Beilstein 4 III 1346, 4 IV 2644.]
L-Ornithine Preparation Products And Raw materials
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Beijing HwrkChemical Technology Co., Ltd | 89508211 18501085097 | sales.bj@hwrkchemical.com | China | 9407 | 55 |
| Syntechem Co.,Ltd | info@syntechem.com | China | 12973 | 57 | |
| Sichuan Kulinan Technology Co., Ltd | 400-1166-196 18981987031 | cdhxsj@163.com | China | 11674 | 57 |
| China Langchem Inc. | 0086-21-58956006 | China | 7798 | 57 | |
| Nanjing Vital Chemical Co., Ltd. | Please Send Email 18652950785 | chemweiao@163.com | China | 4368 | 65 |
| BOC Sciences | 1-631-485-4226; 16314854226 | info@bocsci.com | United States | 9920 | 65 |
| Beijing HuaMeiHuLiBiological Chemical | 010-56205725 | waley188@sohu.com | China | 12323 | 58 |
| Jiangsu Aikon Biopharmaceutical R&D co.,Ltd. | 025-66113011 13913916777 | cfzhang@aikonchem.com | China | 19902 | 55 |
| Haoyuan Chemexpress Co., Ltd. | 021-58950125 | info@chemexpress.com | China | 7545 | 61 |
| MedChemexpress LLC | 021-58955995 | sales@medchemexpress.cn | United States | 4853 | 58 |
View Lastest Price from L-Ornithine manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-10 | L-Ornithine
70-26-8
|
$30.00-42.00 | 99.86% | 10g | TargetMol Chemicals Inc. | ||
 |
2026-07-27 | L-Ornithine
70-26-8
|
$30.00-42.00 | 99.86% | 10g | TargetMol Chemicals Inc. | ||
 |
2026-05-28 | L-Ornithine
70-26-8
|
$60.00 | 1KG | 99% | 5000kg | Hebei Chuanghai Biotechnology Co,.LTD |
-
- L-Ornithine
70-26-8
- $30.00-42.00
- 99.86%
- TargetMol Chemicals Inc.
-
- L-Ornithine
70-26-8
- $30.00-42.00
- 99.86%
- TargetMol Chemicals Inc.
-
- L-Ornithine
70-26-8
- $60.00
- 99%
- Hebei Chuanghai Biotechnology Co,.LTD
