| Size | Price | Stock | Qty |
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| 100mg |
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| 500mg |
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| Other Sizes |
| Targets |
Non-cleavable Linker
N3-C5-NHS ester does not have a specific biological target itself but serves as a chemical linker for bioconjugation. The azide group enables click chemistry reactions with alkyne-functionalized molecules through copper-catalyzed azide-alkyne cycloaddition (CuAAc). The NHS ester reacts with primary amines on proteins, peptides, or other amine-containing molecules. This dual functionality enables the construction of multifunctional conjugates for various research applications. The compound is used in the synthesis of antibody-drug conjugates. |
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| ln Vitro |
In vitro activity of N3-C5-NHS ester is assessed by its ability to participate in click chemistry reactions and conjugate to target molecules. The efficiency of azide-alkyne cycloaddition is evaluated by HPLC or LC-MS analysis of the conjugation products. The NHS ester reactivity with primary amines is assessed by reacting with amine-containing compounds and monitoring the formation of amide bonds by mass spectrometry or UV-Vis spectroscopy. The stability of the resulting conjugates in physiological conditions is also assessed to ensure the linker maintains the integrity of the conjugate.
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| ln Vivo |
In vivo studies for N3-C5-NHS ester are typically conducted as part of complete ADC development, where the antibody-drug conjugate is evaluated rather than the linker alone. The linker's performance in vivo is assessed through pharmacokinetic studies of the ADC, evaluating its stability in circulation, tumor targeting efficiency, and therapeutic efficacy in xenograft models. The non-cleavable nature of this linker ensures that the drug remains attached to the antibody until the ADC is internalized and degraded in the target cell.
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| Enzyme Assay |
For NHS ester conjugation assays, N3-C5-NHS ester is dissolved in anhydrous DMSO or DMF and added to a solution of amine-containing molecule in PBS buffer at pH 7.4-8.5. The reaction mixture is incubated at room temperature for 1-4 hours, and the extent of conjugation is monitored by MALDI-TOF mass spectrometry or SDS-PAGE. For click chemistry reactions, the azide-containing conjugate is reacted with alkyne-functionalized molecules in the presence of copper catalyst and reducing agent. The reaction progress is monitored by HPLC or LC-MS.
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| Cell Assay |
For protein labeling experiments, target proteins are dissolved in PBS buffer at pH 7.4. N3-C5-NHS ester is dissolved in anhydrous DMSO or DMF and added to the protein solution at a molar ratio of 5-20:1 (linker:protein). The reaction is incubated at room temperature for 2-4 hours with gentle shaking. Excess linker is removed by dialysis or size-exclusion chromatography. The labeled protein is analyzed by SDS-PAGE, mass spectrometry, or UV-Vis spectroscopy to confirm successful conjugation. For click chemistry, the azide-labeled protein is reacted with alkyne-functionalized molecules.
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| Animal Protocol |
For ADC studies, target-positive cancer cell lines are cultured in appropriate media. Cells are treated with N3-C5-NHS ester-containing ADC conjugates at various concentrations for 24-72 hours. Cell viability is assessed using MTT or CellTiter-Glo assays, and IC50 values are calculated. Cell binding is evaluated by flow cytometry using fluorescently labeled conjugates, and internalization is assessed using confocal microscopy or pH-sensitive dyes. The non-cleavable nature of the linker means drug release depends on ADC degradation in lysosomes.
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| ADME/Pharmacokinetics |
Pharmacokinetic properties of N3-C5-NHS ester are typically characterized as part of the complete ADC. The non-cleavable nature of the linker contributes to prolonged circulation time and reduced systemic toxicity of the ADC. The compound is a liquid with a purity of 98%+. Detailed PK parameters such as half-life, clearance, and volume of distribution depend on the specific antibody and payload used in the conjugate. The compound is typically handled and stored according to manufacturer recommendations.
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| Toxicity/Toxicokinetics |
N3-C5-NHS ester is a chemical reagent intended for research use only and is not approved for human therapeutic use. As a non-cleavable ADC linker, it is designed to maintain stable drug-antibody conjugation until internalization and degradation in target cells. The compound is a click chemistry reagent used in protein labeling, drug delivery, and material functionalization. Standard laboratory safety precautions should be followed when handling this compound.
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| References | |
| Additional Infomation |
N3-C5-NHS ester is a non-cleavable ADC linker with molecular formula C10H14N4O4 and molecular weight 254.24. It contains an azide group for click chemistry (CuAAc) and an NHS ester for conjugation to primary amines. The compound is used in protein labeling, drug delivery, and material functionalization. It is for research use only and has not been approved for clinical applications. Purity is 98%+ and the compound is a liquid.
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| Molecular Formula |
C10H14N4O4
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|---|---|
| Molecular Weight |
254.24
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| Exact Mass |
254.102
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| CAS # |
866363-70-4
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| PubChem CID |
11594035
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| Appearance |
Colorless to light yellow liquid
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| LogP |
0.854
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| Hydrogen Bond Donor Count |
0
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| Hydrogen Bond Acceptor Count |
6
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| Rotatable Bond Count |
8
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| Heavy Atom Count |
18
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| Complexity |
373
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| Defined Atom Stereocenter Count |
0
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| SMILES |
N(CCCCCC(ON1C(=O)CCC1=O)=O)=[N+]=[N-]
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| InChi Key |
FVWGCTQOFSJEDB-UHFFFAOYSA-N
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| InChi Code |
InChI=1S/C10H14N4O4/c11-13-12-7-3-1-2-4-10(17)18-14-8(15)5-6-9(14)16/h1-7H2
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| Chemical Name |
(2,5-dioxopyrrolidin-1-yl) 6-azidohexanoate
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| HS Tariff Code |
2934.99.9001
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| Storage |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month |
| Shipping Condition |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
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| Solubility (In Vitro) |
DMSO : 100 mg/mL (393.33 mM)
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|---|---|
| Solubility (In Vivo) |
Solubility in Formulation 1: ≥ 2.5 mg/mL (9.83 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 2.5 mg/mL (9.83 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. View More
Solubility in Formulation 3: ≥ 2.5 mg/mL (9.83 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 3.9333 mL | 19.6665 mL | 39.3329 mL | |
| 5 mM | 0.7867 mL | 3.9333 mL | 7.8666 mL | |
| 10 mM | 0.3933 mL | 1.9666 mL | 3.9333 mL |
*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.
Calculation results
Working concentration： mg/mL；
Method for preparing DMSO stock solution： mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.
Method for preparing in vivo formulation:：Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O，mix and clarify.
(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.
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