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
| Product description | Number | Pack Size | Price |
| L-Ornithine ≥98% | CS-4817 | 1g | $122 |
| L-Ornithine ≥98% | CS-4817 | 5g | $485 |
| L-Ornithine ≥98% | CS-4817 | 25g | $1321 |
| L-Ornithine | B8919 | 500mg | $79 |
| L-Ornithine 98% | A329366 | 100mg | $27 |
| More product size | |||
| 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 | |
|---|---|---|---|---|---|
| Hebei Chuanghai Biotechnology Co., Ltd | +8615350571055 | Sibel@chuanghaibio.com | China | 8738 | 58 |
| Hebei Chuanghai Biotechnology Co,.LTD | +86-86-13131129325 +8613131129325 | sales1@chuanghaibio.com | China | 5223 | 58 |
| Hebei Zhuanglai Chemical Trading Co.,Ltd | +8613343047651 | admin@zlchemi.com | China | 3692 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21585 | 55 |
| Nanjing ChemLin Chemical Industry Co., Ltd. | 025-83697070 | product@chemlin.com.cn | CHINA | 3009 | 60 |
| career henan chemical co | +86-0371-86658258 +8613203830695 | sales@coreychem.com | China | 29812 | 58 |
| Shandong chuangyingchemical Co., Ltd. | 18853181302 | sale@chuangyingchem.com | CHINA | 5906 | 58 |
| Standardpharm Co. Ltd. | 86-714-3992388 | overseasales1@yongstandards.com | United States | 14332 | 58 |
| CONIER CHEM AND PHARMA LIMITED | +8618523575427 | sales@conier.com | China | 49979 | 58 |
| Guangzhou Yuheng Pharmaceutical Technology Co., Ltd | +8613580539051 | joe@yuhengpharm.com | CHINA | 21142 | 58 |
View Lastest Price from L-Ornithine manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-07-16 | L-Ornithine
70-26-8
|
$30.00-42.00 | 99.86% | 10g | TargetMol Chemicals Inc. | ||
 |
2026-07-15 | 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
