What does gallate mean?
A gallate is any salt or ester of gallic acid, a naturally occurring phenolic acid found in many plants, including oak galls, tea leaves, grapes, and various fruits. The word belongs chiefly to the vocabulary of chemistry and food science: gallates are notable for their antioxidant properties, which is why esters such as propyl gallate and ethyl gallate are used as preservatives in foods, cosmetics, and pharmaceuticals to slow spoilage and oxidation. Gallates also draw attention for their presence in green tea, where catechin derivatives like epigallocatechin gallate have been extensively studied for possible health benefits. The name traces back to the galls — abnormal growths on oak trees — that were historically harvested for tanning and for making iron-gall ink, linking this modern chemical term to centuries of writing and craftsmanship. Though uncommon in general conversation, gallate is a useful word to recognize when reading ingredient labels or scientific literature.
nounA gallate is any salt or ester of gallic acid, a phenolic acid abundant in plants such as oak galls, tea leaves, and grapes.
- A salt or ester of gallic acid, especially one occurring naturally in plants or used industrially as an antioxidant.
"Propyl gallate is added to foods and cosmetics as an antioxidant to slow oxidation."
"Epigallocatechin gallate, the most abundant catechin in green tea, has been widely studied for its antioxidant properties."
"The preservative list on the label included propyl gallate, a common synthetic antioxidant."
As a countable class of chemical compounds, gallate takes the regular plural form in scientific writing.
"Tea leaves contain several catechin gallates alongside their non-esterified counterparts."
The same bitter compounds in your green tea — catechin gallates — were first named after the oak-tree galls once prized for making iron-gall ink.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of gallate
The word gallate denotes a salt or ester of gallic acid, whose name derives from 'gall', the term for the nutlike swellings formed on oak trees in response to insects or other irritants. These galls were long valued as sources of tannic and gallic acids for tanning leather and producing iron-gall ink. The English term thus reflects a lineage running through Latin 'galla' (the oak growth itself), and it follows the standard chemical naming pattern by which salts and esters of acids ending in '-ic' are given names ending in '-ate'.
How gallate is actually used
Gallate is a technical term used mainly in chemistry, nutrition science, pharmacology, and food-labelling contexts; it is rare in everyday conversation. In casual use it almost always appears as part of a larger compound name (such as epicatechin gallate) rather than on its own.