Dithioerythritol
Names | |
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Preferred IUPAC name
(2R,3S)-1,4-Bis(sulfanyl)butane-2,3-diol | |
Other names
(2R,3S)-1,4-Dimercaptobutane-2,3-diol (no longer recommended)
2,3-Dihydroxybutane-1,4-dithiol Erythro-2,3-dihydroxy-1,4-butanedithiol Erythro-1,4-dimercapto-2,3-butanediol Cleland's reagent (also used for DTT) | |
Identifiers | |
3D model (
JSmol ) |
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ChEBI | |
ChemSpider | |
ECHA InfoCard
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100.027.271 |
PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
C4H10O2S2 | |
Molar mass | 154.253 g/mol |
Melting point | 82 to 84 °C (180 to 183 °F; 355 to 357 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Dithioerythritol (DTE) is a sulfur containing sugar alcohol derived from the corresponding 4-carbon monosaccharide erythrose. It is an epimer of dithiothreitol (DTT). The molecular formula for DTE is C4H10O2S2.
Chemical properties
DTE is a
Applications
Like DTT, DTE makes an excellent
disulfide bonds. The reduction potential of DTE is the same as for DTT, about –0.331 mV.[2] The pKa values of the thiol groups of DTE are 9.0 and 9.9, which is higher than the corresponding values for DTT (9.3 and 9.5).[2] Since reduction of disulfide bonds requires thiolate (ionized thiol), DTE is less efficient at lower pH compared to DTT.[2]
Reduction with DTE is slower than with DTT. This is presumably because the orientation of the OH groups in its cyclic
trans to each other, whereas they are cis to each other in DTE.[3]
References
External links
- Media related to Dithioerythritol at Wikimedia Commons