Dimethyl Disulfide (DMDS) — properties & hazards overview
Boiling point
~ 110 °C
Flash point (CC)
≈ 15 °C
LEL–UEL (air)
~ 1.1–16 vol%
Water solubility
low (~ 2–3 g/L @ 20–25 °C)
Toxicity
irritant / CNS
Flammability
FP ~15 °C; wide range
Chronic risk
mainly odour/irritation
Environmental
VOC / odour
| Property | Value / Note |
|---|---|
| Vapour pressure (25 °C) | ~ 3–4 kPa (moderately volatile) |
| Vapour density (air=1) | ~ 3.2 (heavier than air) |
| Odour / threshold | Strong garlic/sulfur; very low threshold → odour complaints at trace levels |
| Reactivity | Organic disulfide; oxidizes under strong oxidants to sulfoxides/sulfate |
| Typical uses | Catalyst sulfiding (refining), soil fumigant, chemical intermediate |
| Notes for scrubbing | Low water solubility → use oxidizing alkaline liquor; add activated carbon polishing for odour |
*Indicative values; verify with current SDS for design/safety.