Ald-Ph-NHS ester is a non-degradable linker that may be utilized to prepare active antibody conjugate molecules (ADC).

Physicochemical Properties

Molecular Formula	C12H9NO5
Molecular Weight	247.20
Exact Mass	247.048
CAS #	60444-78-2
PubChem CID	4126130
Appearance	White to off-white solid powder
Density	1.4±0.1 g/cm3
Boiling Point	425.4±47.0 °C at 760 mmHg
Melting Point	163ºC
Flash Point	211.1±29.3 °C
Vapour Pressure	0.0±1.0 mmHg at 25°C
Index of Refraction	1.606
LogP	-0.2
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	4
Heavy Atom Count	18
Complexity	368
Defined Atom Stereocenter Count	0
InChi Key	VHYRHFNOWKMCHQ-UHFFFAOYSA-N
InChi Code	InChI=1S/C12H9NO5/c14-7-8-1-3-9(4-2-8)12(17)18-13-10(15)5-6-11(13)16/h1-4,7H,5-6H2
Chemical Name	(2,5-dioxopyrrolidin-1-yl) 4-formylbenzoate
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, 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)

Biological Activity

Targets

Non-cleavable Linker

Solubility Data

Solubility (In Vitro)

DMSO : 100 mg/mL (404.53 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (10.11 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 (10.11 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), suspension 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. Solubility in Formulation 3: ≥ 2.5 mg/mL (10.11 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	4.0453 mL	20.2265 mL	40.4531 mL
	5 mM	0.8091 mL	4.0453 mL	8.0906 mL
	10 mM	0.4045 mL	2.0227 mL	4.0453 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.