Dimethyl disulfide, commonly abbreviated as DMDS, is a colorless liquid with a strong, sulfurous odor and the chemical formula C2H6S2 that is used as a solvent and intermediate in chemical manufacturing. Although considered relatively low in acute toxicity, exposure may cause skin and respiratory irritation. In systems handling DMDS, O-rings, rubber seals, gaskets, and plastic components should be reviewed for chemical compatibility, as sulfur containing compounds can impact certain rubber materials. Proper handling, storage, and protective practices are recommended.

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