Mal-PEG6-NHS ester is a non-degradable ADC linker containing Maleimide group, 6-unit PEG and NHS ester.

Physicochemical Properties

Molecular Formula	C23H34N2O12
Molecular Weight	530.5223
Exact Mass	530.211
CAS #	1599472-25-9
PubChem CID	60146184
Appearance	Colorless to light yellow liquid
Density	1.3±0.1 g/cm3
Boiling Point	635.8±65.0 °C at 760 mmHg
Flash Point	338.3±34.3 °C
Vapour Pressure	0.0±1.9 mmHg at 25°C
Index of Refraction	1.536
LogP	-3.68
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	12
Rotatable Bond Count	23
Heavy Atom Count	37
Complexity	754
Defined Atom Stereocenter Count	0
SMILES	O(C(C([H])([H])C([H])([H])OC([H])([H])C([H])([H])OC([H])([H])C([H])([H])OC([H])([H])C([H])([H])OC([H])([H])C([H])([H])OC([H])([H])C([H])([H])OC([H])([H])C([H])([H])N1C(C([H])=C([H])C1=O)=O)=O)N1C(C([H])([H])C([H])([H])C1=O)=O
InChi Key	UUNUCVXNAHYFJP-UHFFFAOYSA-N
InChi Code	InChI=1S/C23H34N2O12/c26-19-1-2-20(27)24(19)6-8-32-10-12-34-14-16-36-18-17-35-15-13-33-11-9-31-7-5-23(30)37-25-21(28)3-4-22(25)29/h1-2H,3-18H2
Chemical Name	(2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[2-[2-[2-[2-(2,5-dioxopyrrol-1-yl)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 Note: This product requires protection from light (avoid light exposure) during transportation and storage.
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

References

[1]. Relaxin prodrugs. WO2015067791A1.

Solubility Data

Solubility (In Vitro)

DMSO : ~100 mg/mL (~188.49 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (4.71 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 (4.71 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 (4.71 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	1.8849 mL	9.4247 mL	18.8494 mL
	5 mM	0.3770 mL	1.8849 mL	3.7699 mL
	10 mM	0.1885 mL	0.9425 mL	1.8849 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.