Mal-amido-PEG10-C2-NHS ester is a non-cleavable (non-degradable) ADC linker containing maleimide groups and NHS ester. NHS ester may be utilized to label proteins, amine-modified oligonucleotides, and other amine-containing molecules with primary amines (-NH2).

Physicochemical Properties

Molecular Formula	C34H55N3O17
Molecular Weight	777.81
Exact Mass	777.353
CAS #	1137109-22-8
PubChem CID	118986681
Appearance	Light yellow to green yellow liquid
LogP	-3.8
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	17
Rotatable Bond Count	38
Heavy Atom Count	54
Complexity	1090
Defined Atom Stereocenter Count	0
SMILES	O(C(CCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCNC(CCN1C(C=CC1=O)=O)=O)=O)N1C(CCC1=O)=O
InChi Key	DUKFGPQZJAPKMG-UHFFFAOYSA-N
InChi Code	InChI=1S/C34H55N3O17/c38-29(5-8-36-30(39)1-2-31(36)40)35-7-10-45-12-14-47-16-18-49-20-22-51-24-26-53-28-27-52-25-23-50-21-19-48-17-15-46-13-11-44-9-6-34(43)54-37-32(41)3-4-33(37)42/h1-2H,3-28H2,(H,35,38)
Chemical Name	(2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[3-(2,5-dioxopyrrol-1-yl)propanoylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoate
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
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

Targets	Non-cleavable Linker
References	[1]. Microwave-assisted solid-phase synthesis of antisense acpP peptide nucleic acid-peptide conjugates active against colistin- and tigecycline-resistant E. coli and K. pneumoniae. Eur J Med Chem. 2019 Apr 15;168:134-145. [2]. Preparation and application of FAPalpha activated polypeptide magnetic nanosphere compound used for diagnosis of tumors. CN105524141A.

Solubility Data

Solubility (In Vitro)

DMSO : 100 mg/mL (128.57 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (3.21 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 (3.21 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. Solubility in Formulation 3: ≥ 2.5 mg/mL (3.21 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (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 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	1.2857 mL	6.4283 mL	12.8566 mL
	5 mM	0.2571 mL	1.2857 mL	2.5713 mL
	10 mM	0.1286 mL	0.6428 mL	1.2857 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.