What does chelator mean?
A chelator is a substance—usually an organic molecule—that binds tightly to a metal ion by wrapping around it with several bonding sites at once, forming a stable, ring-like structure called a chelate. The name evokes a crab's claw, a nod to the way these molecules grasp their metallic targets. Chelators are indispensable across science and medicine: EDTA and similar compounds are used to treat lead and other heavy-metal poisoning by locking toxic metals so the body can excrete them; iron chelators help patients with conditions requiring repeated blood transfusions; and industrial processes use them to soften water and stabilize formulations. The term is technical, appearing mainly in chemistry, medicine, and environmental science rather than everyday conversation, but it names a concept of real practical importance wherever metals must be captured, transported, or removed.
nounA substance, typically an organic compound, that binds to a metal ion by forming multiple coordinate bonds around it, holding the ion in a stable ring-like complex. Chelators are used in medicine to treat heavy-metal poisoning and in industry to control metal ions in solutions.
- A molecule or substance that binds a metal ion through multiple coordinate bonds to form a stable, ring-structured complex (a chelate).
"Doctors administered a chelator to bind the lead circulating in the patient's bloodstream."
"EDTA is a widely used chelator in both laboratory work and the treatment of heavy-metal poisoning."
"The soil remediation plan relied on a plant-safe chelator to mobilize the nickel without leaching it into groundwater."
Regular plural; countable noun referring to individual substances or molecules.
"Different chelators show different affinities for calcium and magnesium."
A chelator grips metal ions the way a crab's claw grips its prey — fittingly, its name comes from the Greek word for exactly that claw.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of chelator
Chelator derives ultimately from the Greek 'khēlē', meaning claw, via the related term 'chelate', coined in the early twentieth century by chemists describing how multi-dentate ligands clamp onto metal ions like pincers. The agent-noun suffix '-or' marks it as the thing doing the binding, giving English cognates such as chela, chelicera, and chelicerate, all built on the same claw root.
Related word forms
How chelator is actually used
A technical term belonging chiefly to chemistry, medicine, and environmental science; it is rarely used outside scientific registers. In medical contexts it often appears in phrases like 'chelator therapy' or 'chelation therapy', especially regarding lead, iron, or mercury poisoning. The plural is regular (chelators).
Easily confused with chelator
'Celerator' is not a standard English word; 'chelator' begins with the silent-style 'ch' pronounced as /k/, which can mislead spellers and readers.