Product name: Dimethyl Disulfide; DMDS
CAS‑No：624‑92‑0
EC No：210‑871‑0
Formula：C2H6S2
Molecular Weight：94.19 g/mol1.
Synonyms: Methyl disulfide; DMDS
Appearance: Colorless to pale‑yellow clear liquid
Odor: Strong garlic‑like, pungent odor
Purity(GC): ≥98.0 % (industrial grade ≥99.0 % available)
Moisture: ≤0.1 %
Sulphur monomethyl ether: ≤0.5 %
Physical‑Chemical Properties
| Property | Value |
|---|---|
| Melting point | −85 °C |
| Boiling point | 109‑110 °C @760 mmHg |
| Density (20 °C) | 1.062‑1.068 g/cm³ |
| Refractive index n₂₀/D | 1.525‑1.528 |
| Flash point (closed cup) | 21‑24 °C (highly flammable) |
| Auto‑ignition temperature | >300 °C |
| Explosion limits | 1.1‑8.0 % vol in air |
| Vapor pressure (20 °C) | 22 mmHg |
| Solubility in water | Slightly soluble ~2.5‑4.2 g/L @20 °CInternatio... |
| Solubility | Miscible with ethanol, ether, acetone, hydrocarbon solventsFUJIFILM W... |
| Vapor density (air=1) | 3.24 |
Quality specification
| Test Item | Unit | Specification | Typical Result | Test Method |
|---|---|---|---|---|
| Appearance | — | Colorless to pale‑yellow clear liquid | Colorless clear liquid | Visual |
| Purity (GC) | % | ≥99.0 | 99.82 | GC‑FID |
| Methyl Mercaptan | % | ≤0.10 | 0.03 | GC‑FID |
| Dimethyl Sulfide | % | ≤0.20 | 0.08 | GC‑FID |
| Water Content | % | ≤0.10 | 0.045 | Karl‑Fischer |
| Sulfur Content | % | 67.8‑68.4 | 68.1 | Titration |
| Density @20℃ | g/cm³ | 1.062‑1.068 | 1.065 | GB/T‑4472 |
| Refractive Index n₂₀/D | — | 1.525‑1.528 | 1.526 | Refractometer |
| APHA Color | — | ≤120 | 40 | Colorimeter |
Main Applications
- Hydro‑cracking /hydro‑treating catalyst pre‑sulfiding agent in refinery
- Pesticide intermediate, soil fumigant
- Synthetic flavor raw material
- Organic synthesis intermediate
Packing, Storage & Handling
Packing: 200kg/iron drum, 16000kg/20"FCL; or as per request.
Store in cool, dry, well‑ventilated area, temperature below 15‑25 °C, tightly sealed container
Keep away from heat, ignition sources, oxidizing agents, strong acidsAvoid breathing vapors; wear chemical‑resistant gloves, goggles, respirator for high‑concentration exposure
Container must be grounded for transfer operations (static hazard)
Transport Information
UN‑Number：2381
Hazard class：3 (Flammable liquid), 6.1 (Toxic)
Packing group：IIInternatio...
Proper shipping name：Dimethyl disulfide6.
GHS hazards：H225 Highly flammable liquid and vapour；H331 Toxic if inhaled；H319 Causes serious eye irritation；H410 Very toxic to aquatic life with long lasting effects
Not PFAS / Not CMR substance; subject to hazardous‑chemical management for domestic & international shipment.
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