Mal-amido-PEG8-C2-acid (example 142) is a non-cleavable (non-degradable) ADC linker. The information is from patent US2018339985.

Physicochemical Properties

Molecular Formula	C26H44N2O13
Molecular Weight	592.633169174194
Exact Mass	592.284
CAS #	1334177-86-4
PubChem CID	51340955
Appearance	Colorless to off-white solid-liquid Mixture
LogP	-1.9
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	13
Rotatable Bond Count	30
Heavy Atom Count	41
Complexity	733
Defined Atom Stereocenter Count	0
InChi Key	ARKUDJPBDMAVBL-UHFFFAOYSA-N
InChi Code	InChI=1S/C26H44N2O13/c29-23(3-6-28-24(30)1-2-25(28)31)27-5-8-35-10-12-37-14-16-39-18-20-41-22-21-40-19-17-38-15-13-36-11-9-34-7-4-26(32)33/h1-2H,3-22H2,(H,27,29)(H,32,33)
Chemical Name	3-[2-[2-[2-[2-[2-[2-[2-[2-[3-(2,5-dioxopyrrol-1-yl)propanoylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoic acid
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

References

[1]. PDD Compounds. Patent. US2018339985.

Solubility Data

Solubility (In Vitro)

DMSO : ~250 mg/mL (~421.85 mM) Ethanol : ~100 mg/mL (~168.74 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.08 mg/mL (3.51 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 20.8 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: ≥ 2.08 mg/mL (3.51 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 20.8 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: ≥ 2.08 mg/mL (3.51 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 20.8 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	1.6874 mL	8.4370 mL	16.8739 mL
	5 mM	0.3375 mL	1.6874 mL	3.3748 mL
	10 mM	0.1687 mL	0.8437 mL	1.6874 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.