Abstract An improved method for the synthesis and isolation of large amounts of crystalline sodium cysteine-S-sulfate is described. The final product has been characterized as the monohydrate, monosodium salt by elemental analysis and various equivalent weight determinations. The equilibrium constant for the reaction of cysteine-S-sulfate with cysteine, yielding cystine and inorganic sulfite, has been estimated.

中文翻译：

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半胱氨酸-S-硫酸钠一水合物的合成与表征

摘要描述了一种合成和分离大量结晶半胱氨酸-S-硫酸盐的改进方法。通过元素分析和各种等效重量测定，最终产品已表征为一水合物，一钠盐。估计了半胱氨酸-S-硫酸盐与半胱氨酸反应生成胱氨酸和无机亚硫酸盐的平衡常数。