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Description
Isobutyl Gallate is the isobutyl ester of gallic acid, a naturally occurring phenolic compound distinguished by three adjacent hydroxyl groups on its aromatic ring. The esterification process converts the highly polar gallic acid into a derivative that dissolves more readily in organic and lipid media, without removing the trihydroxyphenol core that is the source of its antioxidant activity. In the laboratory, this compound serves both as a non-heterocyclic building block for synthetic work and as a reference compound in antioxidant studies and investigations of the relationship between chemical structure and biological activity.
The property that makes this material a preferred choice is the ability of its phenolic groups to donate hydrogen atoms and quench free radicals, combined with the stability of the resulting phenoxy radical, which is stabilised by resonance across the aromatic ring. The branched isobutyl chain confers intermediate lipophilicity, placing the compound between short-chain esters such as methyl gallate and long-chain esters such as octyl gallate. This intermediate position is particularly valuable when researchers wish to map how alkyl chain length and branching influence antioxidant power, solubility, and the distribution of a compound within emulsion systems and membranes.
Laboratories in Indonesia draw on this material in natural product chemistry, food and nutraceutical research, and formulation studies where a well-characterised gallate ester is needed as a comparator. It supports academic research groups, government research institutes, and industrial laboratories investigating antioxidant behaviour, and its defined identity makes it a dependable point of reference when analytical or biological results from different gallate derivatives are compared against one another.
Laboratory Applications
Antioxidant activity assays — its phenolic hydroxyl groups readily donate hydrogen atoms, making it a reliable comparator compound in radical scavenging evaluations run alongside test samples.
Structure–activity relationship studies — the branched isobutyl chain provides an intermediate lipophilicity data point between methyl gallate and octyl gallate within a homologous ester series.
Non-heterocyclic building block in synthesis — the trihydroxyphenol core and ester group offer multiple reactive handles for preparing further gallate derivatives and related phenolic compounds.
Emulsion and membrane distribution research — its moderate lipid solubility allows investigators to examine how an antioxidant partitions between aqueous and lipid phases in model systems.
Natural product and phenolic chemistry reference — as a defined gallic acid ester, it supports identification and comparison work where authentic phenolic standards are required for method development.
Specifications
Brand: TCI
CAS number: 3856-05-1
Category: Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
Pack sizes: supplied in the standard catalogue pack sizes offered by TCI for this item
Physical form: solid organic phenolic ester
Storage: keep in a tightly closed container, protected from light and moisture, in accordance with the manufacturer's stated storage conditions
Handling and Storage
Store Isobutyl Gallate in a cool, dry place away from direct sunlight, heat sources, and strong oxidising agents, since polyphenolic compounds are susceptible to oxidation and discolouration on prolonged exposure to air and light. Use tightly closed amber glass or otherwise light-protected containers, and reseal promptly after each withdrawal to limit moisture uptake. Handle the material in a well-ventilated area or fume hood, wearing gloves, safety glasses, and a laboratory coat, and avoid generating dust during weighing. Use clean, dry spatulas to prevent contamination of the bulk material, label all working solutions clearly, and consult the manufacturer's safety data sheet before use and prior to disposal of any residues.
