High quality L-Cysteine S-Sulfate Na

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Redox Properties of L-Cysteine S-Sulfate Na
TheS-sulfonate-thiol linkage (-S-SO_3^-)is the core structural moiety responsible for the redox reactivity of L-cysteine S-sulfate sodium salt, and this bond has moderate stability and can undergo reversible redox reactions under specific conditions.Reduction reaction: In the presence of reducing agents such as L-cysteine, glutathione (GSH), or sodium sulfite, the-S-SO3^-bond is cleaved, and the compound is reduced to L-cysteine and sulfate ions (SO4^{2-}). This reaction is pH-dependent, with optimal reaction rates occurring in weakly acidic to neutral environments (pH 5.0–7.0). In biological systems, this reduction process can be catalyzed by sulfhydryl transferases, enabling the compound to act as a sulfhydryl donor and participate in the regulation of intracellular redox balance.Oxidation resistance: Compared with free L-cysteine, the sulfonate-modified thiol group is less susceptible to oxidation by oxygen or reactive oxygen species (ROS). This is because the electron-withdrawing effect of the sulfonate group reduces the electron density of the sulfur atom, inhibiting the formation of disulfide bonds (-S-S-). Therefore, the compound has better oxidative stability in aqueous solutions and does not easily form dimers through oxidation, which is an advantage over L-cysteine in terms of storage and application.Oxidation reaction under strong conditions: In the presence of strong oxidants such as hydrogen peroxide (H2O2) or potassium permanganate (KMnO4), the-S-SO3^-bond is completely oxidized, producing sulfate ions and cysteic acid derivatives, accompanied by the release of sulfur dioxide (SO2) gas.

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