1,4-Dithioerythritol is a small-molecule dithiol reducing agent with a four-carbon backbone bearing two thiol groups positioned to participate in reversible redox chemistry. The molecule contains two free -SH functional groups (and no amino or carboxyl groups), allowing it to undergo thiol-disulfide exchange reactions that can maintain or restore reduced forms of disulfide-containing biomolecules during handling. In biochemical workflows and analytical sample preparation, 1,4-Dithioerythritol is employed to control the redox state of thiols and to support downstream protein chemistry such as disulfide reduction prior to derivatization or peptide-related analyses.
CAT No: CP27365
CAS No:6892-68-8
Synonyms/Alias:Dithioerythritol;1,4-Dithioerythritol;DTE;(2R,3S)-1,4-DIMERCAPTOBUTANE-2,3-DIOL;6892-68-8;erythro-1,4-Dimercapto-2,3-butanediol;erythro-2,3-Dihydroxy-1,4-butanedithiol;(2R,3S)-1,4-disulfanylbutane-2,3-diol;CHEBI:17456;(2R*,3S*)-1,4-dimercapto-2,3-butanediol;(2R,3S)-1,4-bis(sulfanyl)butane-2,3-diol;Clelandsreagent;DTU;C4H10O2S2;2,3-Dihydroxybutane-1,4-dithiol;ERYTHRITOL,1,4-DITHIO-;EINECS229-998-8;BRN1719756;2,3-DIHYDROXY-1,4-DITHIOBUTANE;(R*,S*)-1,4-Dimercapto-2,3-butanediol;(R*,S*)-1,4-Dimercaptobutane-2,3-diol;AmbotzRL-1019;2,3-Butanediol,1,4-dimercapto-,(theta,S)-;SCHEMBL78921;1,4-Dithioerythritol(DTE)
1,4-Dithioerythritol is a small-molecule redox-active dithiol used as a strong reducing agent in biochemical and protein chemistry workflows. Its two thiol groups readily participate in disulfide exchange, making it a practical reagent for maintaining reduced cysteine environments and for preparing thiol-containing biomolecules for downstream conjugation or analysis. In research settings, 1,4-Dithioerythritol is routinely handled as a technical reagent for controlling oxidation state rather than as an amino acid building block.
1. Protein Reduction Workflows
1,4-Dithioerythritol is widely used in protein sample preparation to reduce disulfide bonds and maintain cysteine residues in a reduced state prior to electrophoresis, proteomic processing, or biochemical assays. Researchers in protein chemistry and structural biology use it to standardize redox conditions across samples, improving reproducibility when cysteine oxidation or disulfide scrambling would otherwise complicate interpretation. The reagent's dithiol functionality supports efficient disulfide exchange, which is particularly valuable when proteins or protein fragments contain multiple cysteines that need to be uniformly reduced before further handling.
2. Thiol-Dependent Bioconjugation Prep
1,4-Dithioerythritol is used to generate or enrich free thiols on biomolecules prior to thiol-reactive labeling and conjugation strategies. Chemical biology groups and bioconjugation specialists often reduce disulfide-containing targets to expose reactive sulfhydryl groups, enabling more consistent coupling to maleimide-, iodoacetamide-, or other thiol-selective chemistries used in probe construction and reagent development. Because 1,4-Dithioerythritol is a fast redox reagent, it is commonly selected when the key requirement is controlled conversion to a reduced thiol form before initiating the next functionalization step.
3. Analytical Sample Redox Control
1,4-Dithioerythritol supports analytical method development and routine sample conditioning where redox state strongly affects readouts, including LC-MS sample preparation and thiol quantification workflows. In proteomics and analytical chemistry laboratories, maintaining a reduced cysteine environment helps reduce artifactual disulfide formation that can shift peptide identities, complicate mapping, or broaden chromatographic behavior. The reagent is also used in workflows that require consistent thiol availability for derivatization-based measurements, where oxidation during handling would otherwise introduce variability.
4. Biomolecular Material Processing
1,4-Dithioerythritol is applied in biomaterials and macromolecular processing steps that rely on thiol/disulfide redox chemistry, such as preparing thiol-functional intermediates for polymer or surface modification. Materials researchers use it to tune the oxidation state of cysteine-containing building blocks or to support formation of reactive thiol species needed for subsequent crosslinking or immobilization chemistries. This use is driven by the reagent's strong reducing capacity and its ability to drive disulfide exchange under controlled laboratory conditions, enabling more reproducible downstream material fabrication.
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