Mal-PEG2-acid

CAS NO.：1374666-32-6
Empirical Formula: C11H15NO6
Molecular Weight: 257.24
MDL number: MFCD23726620
Update Date: 2026-08-28 09:47:35

What is Mal-PEG2-acid?

Description

Mal-PEG2-acid is a PEG linker containing a maleimide group with a terminal carboxylic acid. The hydrophilic PEG spacer increases solubility in aqueous media. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond.

Biological Activity

Mal-PEG2-acid is a non-cleavable ADC linker for the synthesis of antibody-drug conjugates (ADCs). It can bind to Tubulysin (HY-128914) and its cytotoxic derivatives activity. It can also be used as a PROTAC linker for PROTAC synthesis.

in vitro

ADCs are comprised of an antibody to which is attached an ADC cytotoxin through an ADC linker.

Properties of Mal-PEG2-acid

Boiling point:	455.7±35.0 °C(Predicted)
Density	1.329±0.06 g/cm3(Predicted)
form	powder to crystal
pka	4.27±0.10(Predicted)
color	White to Light yellow
CAS DataBase Reference	1374666-32-6

Safety information for Mal-PEG2-acid

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection.