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NHS-PEG2-SS-PEG2-NHS

Alias: NHSPEG2SSPEG2NHS; NHS PEG2 SS PEG2 NHS
NHS-PEG2-SS-PEG2-NHS is a cleavable (degradable) ADC (Antibody-drug conjugate) linker containing 4 Polyethylene glycol (PEG) units, which may be utilized to prepare Antibody-drug conjugates (ADC).
NHS-PEG2-SS-PEG2-NHS
NHS-PEG2-SS-PEG2-NHS Chemical Structure Product category: New2
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
10mg
100mg
500mg
Official Supplier of:
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Product Description
NHS-PEG2-SS-PEG2-NHS is a cleavable (degradable) ADC (Antibody-drug conjugate) linker containing 4 Polyethylene glycol (PEG) units, which may be utilized to prepare Antibody-drug conjugates (ADC).
Product Application
Overview
NHS-PEG2-SS-PEG2-NHS is a cleavable, degradable ADC linker supplied by InvivoChem for research use. This linker contains four polyethylene glycol (PEG) units and is designed for use in the preparation of antibody-drug conjugates. As a PEG-based bifunctional linker with reactive NHS groups, it provides researchers with a practical tool for connecting suitable components in bioconjugation workflows.
ADC linkers play an essential role in the design of targeted conjugates by helping join antibodies with cytotoxic payloads or other functional molecules. The PEG segments in NHS-PEG2-SS-PEG2-NHS can support linker flexibility and handling properties, while the cleavable disulfide-containing structure adds value in applications where degradable linkage is desired.
Its research-grade quality and consistent composition make it suitable for controlled laboratory studies involving conjugate design and linker evaluation.

Mechanism of Action
NHS-PEG2-SS-PEG2-NHS functions as a cleavable ADC linker that may be utilized to prepare antibody-drug conjugates. ADCs are constructed from an antibody and a cytotoxic agent joined together by a linker, and this compound is designed to serve that bridging role in experimental conjugation strategies.
The bifunctional NHS termini enable coupling to compatible amine-containing molecules, while the PEG units provide spacing within the construct. Its cleavable and degradable design makes it especially relevant for studies investigating linker stability, controlled release behavior, and conjugate architecture in antibody-based delivery systems.
Rather than acting as a bioactive therapeutic compound on its own, NHS-PEG2-SS-PEG2-NHS is valuable as a structural and functional component in the development of research conjugates.

Research Applications
NHS-PEG2-SS-PEG2-NHS is widely used in antibody-drug conjugate research, linker design studies, and bioconjugation workflows. It supports experimental work involving ADC preparation, degradable linker evaluation, and PEG-based conjugate development.
Researchers may also use it in comparative studies of linker chemistry or in broader biomolecule conjugation projects requiring reactive NHS functionality.
InvivoChem supplies NHS-PEG2-SS-PEG2-NHS with supporting documentation, including COA, SDS, and usage instructions, to promote consistency in laboratory workflows. For research involving cleavable ADC linkers or PEG-based conjugation strategies, NHS-PEG2-SS-PEG2-NHS offers a dependable, research-ready solution. Reach out to InvivoChem for more information.
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Biological Activity I Assay Protocols (From Reference)
ln Vitro
ADCs are made up of an antibody and an ADC cytotoxin that are joined together by an ADC linker[1].
References

[1]. Strategies and challenges for the next generation of antibody-drug conjugates. Nat Rev Drug Discov. 2017 May;16(5):315-337.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C??H??N?O??S?
Molecular Weight
580.63
Appearance
Colorless to off-white solid-liquid Mixture
Synonyms
NHSPEG2SSPEG2NHS; NHS PEG2 SS PEG2 NHS
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Note: Please store this product in a sealed and protected environment (e.g. under nitrogen), avoid exposure to moisture.
Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples
Solubility (In Vivo)
Solubility in Formulation 1: 2.5 mg/mL (4.31 mM) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution; with sonication.
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 (4.31 mM) 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; with ultrasonication.
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.

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Solubility in Formulation 3: 2.5 mg/mL (4.31 mM) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution; with ultrasonication.
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 corn oil and mix evenly.


 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 1.7223 mL 8.6113 mL 17.2227 mL
5 mM 0.3445 mL 1.7223 mL 3.4445 mL
10 mM 0.1722 mL 0.8611 mL 1.7223 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.

Calculator

Molarity Calculator allows you to calculate the mass, volume, and/or concentration required for a solution, as detailed below:

  • Calculate the Mass of a compound required to prepare a solution of known volume and concentration
  • Calculate the Volume of solution required to dissolve a compound of known mass to a desired concentration
  • Calculate the Concentration of a solution resulting from a known mass of compound in a specific volume
An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
  • Enter 350.26 in the Molecular Weight (MW) box
  • Enter 10 in the Concentration box and choose the correct unit (mM)
  • Enter 5 in the Volume box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
  • Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
  • Enter 25 into the Concentration (End) box and select the correct unit (mM)
  • Enter 25 into the Volume (End) box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
  • To calculate molar mass of a chemical compound, please enter the chemical/molecular formula and click the “Calculate’ button.
Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

  • Enter the mass of the reagent and the desired reconstitution concentration as well as the correct units
  • Click the “Calculate” button
  • The answer appears in the Volume (to add to vial) box
In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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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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