What does hydroxylation mean?
Hydroxylation is the chemical process of introducing a hydroxyl group, consisting of an oxygen atom bonded to a hydrogen atom, into a molecule. It commonly involves replacing a hydrogen atom or another functional group and is generally classified as an oxidation reaction. The term is especially important in organic chemistry and biochemistry, where hydroxylation can change a compound’s solubility, biological activity, or metabolic behavior. Enzymes called cytochrome P450 commonly carry out biological hydroxylation reactions. The related verb hydroxylate describes the addition of a hydroxyl group, while hydroxylated is the usual adjective for a molecule that has undergone this process. In medicinal chemistry, hydroxylation can influence how strongly a drug binds to its target and how quickly it is metabolized and eliminated from the body.
nounThe chemical process of introducing a hydroxyl group (–OH) into a molecule, usually by replacing another atom or functional group. It is an important type of oxidation reaction in organic chemistry and biochemistry.
- The chemical process of introducing a hydroxyl group into a molecule.
"The enzyme catalyzes the hydroxylation of the substrate in several steps."
"Hydroxylation of the aromatic ring produced a family of biologically active compounds."
"The reaction conditions controlled the hydroxylation of the alcohol."
The process is normally treated as uncountable; plural forms are uncommon and appear mainly in technical descriptions of multiple distinct reactions.
"The researchers compared the hydroxylations of several related substrates."
Hydroxylation puts an oxygen-and-hydrogen tag on a molecule, helping determine many of the properties and biological activities of organic compounds.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of hydroxylation
The word is formed from hydroxyl, a term for the –OH group, together with the suffix -ation, which forms a noun indicating a process or action. The hydroxyl group itself takes its name from hydrogen and oxygen, reflecting its chemical composition. Related chemical terms include hydroxide and the combining form hydroxy-.
Related word forms
How hydroxylation is actually used
Usually used in chemistry, biochemistry, pharmacology, and environmental science. In biochemistry, enzymatic hydroxylation often occurs through oxidation involving molecular oxygen and is mediated by cytochrome P450 enzymes.
Easily confused with hydroxylation
Hydroxylation is the introduction of a hydroxyl group into a molecule, whereas hydrolysis is the chemical breakdown of a molecule by reaction with water.