1. Metabolic Enzyme/Protease
  2. Endogenous Metabolite
  3. L-Ornithine

L-Ornithine  (Synonyms: (S)-2,5-Diaminopentanoic acid)

Cat. No.: HY-B1352 Assay: 99.56%
COA Handling Instructions

L-Ornithine ((S)-2,5-Diaminopentanoic acid) is a non-proteinogenic amino acid, is mainly used in urea cycle removing excess nitrogen in vivo. L-Ornithine shows nephroprotective.

For research use only. We do not sell to patients.

L-Ornithine Chemical Structure

L-Ornithine Chemical Structure

CAS No. : 70-26-8

Size Price Stock Quantity
Solid + Solvent
10 mM * 1 mL in Water
ready for reconstitution
USD 55 In-stock
10 mM * 1 mL in Water USD 55 In-stock
100 mg USD 50 In-stock
500 mg USD 75 In-stock
1 g   Get quote  
5 g   Get quote  

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This product is a controlled substance and not for sale in your territory.

Customer Review

Based on 3 publication(s) in Google Scholar

Other Forms of L-Ornithine:

Top Publications Citing Use of Products
  • Biological Activity

  • Purity & Documentation

  • References

  • Customer Review


L-Ornithine ((S)-2,5-Diaminopentanoic acid) is a non-proteinogenic amino acid, is mainly used in urea cycle removing excess nitrogen in vivo. L-Ornithine shows nephroprotective[1][2].

IC50 & Target

Human Endogenous Metabolite


Microbial Metabolite


In Vitro

L-Ornithine (0-10 mM) activates the CaSR in a concentration-dependent manner and exerts effects on Ca2+ signaling in HK-2 cells[2].
L-Ornithine (10 mM) activates TRPC channels mediated Ca2+ entry pathway in HK-2 cells[2].
L-Ornithine (100 or 300 μM; 24 h) shows the protection against ROS generation in HK-2 cells via ROCE pathway[2].
L-Ornithine (10 μM) can protect the ROS and oxidative damage in HK-2 cells exposed to H2O2[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight







White to off-white



Structure Classification

Room temperature in continental US; may vary elsewhere.


4°C, sealed storage, away from moisture and light

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)

Solvent & Solubility
In Vitro: 

H2O : 50 mg/mL (378.33 mM; Need ultrasonic)

DMSO : 1.3 mg/mL (9.84 mM; Need ultrasonic)

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 7.5666 mL 37.8329 mL 75.6659 mL
5 mM 1.5133 mL 7.5666 mL 15.1332 mL
10 mM 0.7567 mL 3.7833 mL 7.5666 mL
*Please refer to the solubility information to select the appropriate solvent.
Purity & Documentation

Purity: 99.56%

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L-Ornithine Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • Molarity Calculator

  • Dilution Calculator

The molarity calculator equation

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass   Concentration   Volume   Molecular Weight *
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The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

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