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3-Maleimidopropionic acid, N-(2-Carboxyethyl)maleimide
Empirical Formula (Hill Notation):
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old score: 17
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Atom Economy
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103-106 °C (lit.)

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General description

N-Maleoyl-β-alanine (3-maleimidopropanoic acid) is an aliphatic N-substituted maleimide. It is one of the component of the stabilizing solution for EC145 (a folate-targeted vinca alkaloid conjugate) used in rodent pharmacokinetic studies.


N-Maleoyl-β-alanine (3-maleimidopropanoic acid, N-(2-carboxyethyl)maleimide)) is the suitable reagent used in the following studies:
  • To decrease the biotin binding affinity of Avd(S16C) (avidin with a single point mutation S16C).
  • As a side chain reactive agent to modify tryptic peptides that result in mass shifts indicating the presence of cysteine residues.
  • To preblock Xenopus laevis oocytes for exposed cysteines used as an expression system in the study of conformational changes in cASIC1a Receptors.
It may be used in the following studies:
  • As a protective agent for keratin fiber in high temperature process.
  • As a non-cleavable maleimido moiety during the synthesis of tetrawalled molecular umbrella-octaarginine conjugates.
  • Synthesis of organotin carboxylates of N-Maleoyl-β-alanine.
  • To functionalize the gold surfaces to interact with cysteine-modified peptide.
  • Preparation of cross-linked dextran–poly(ethylene glycol) hydrogel substrate.


1 g in glass bottle
250 mg in glass bottle
Bottomless glass bottle. Contents are inside inserted fused cone.


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Hazard Statements

Precautionary Statements

Target Organs

Respiratory system

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

A new strategy for the preparation of maleimide-functionalised gold surfaces.
Electrochemistry Communications 12.10 (2010): 1403-1406.
Zhang X, et al
Electrochemical Communications, 12(10), 1403-1406 (2010)
Christopher P Leamon et al.
The Journal of pharmacology and experimental therapeutics, 336(2), 336-343 (2010-10-28)
During a phase I trial of EC145 (a folate-targeted vinca alkaloid conjugate), constipation was identified as the dose-limiting toxicity, probably from a nonfolate receptor-related liver clearance process capable of releasing unconjugated vinca alkaloid from EC145 and shuttling it to the...
Organotin (IV) derivatives of N-maleoylamino acids: their synthesis and structural elucidation.
Bhatti MH, et al
Turkish Journal of Chemistry, 29(5), 463-476 (2005)
Protecting keratin fiber with water soluble N-substituted maleimides in high temperature processes.
Cai JY, et al.
Fibers and Polymers, 15(11), 2247-2252 (2014)
Swarna S Ramaswamy et al.
The Journal of biological chemistry, 288(50), 35896-35903 (2013-11-08)
Acid-sensing ion channels are cation channels activated by external protons and play roles in nociception, synaptic transmission, and the physiopathology of ischemic stroke. Using luminescence resonance energy transfer (LRET), we show that upon proton binding, there is a conformational change...

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