624-92-0
Methyl disulfide
CAS: 624-92-0
Molecular Formula: C2H6S2
624-92-0 - Names and Identifiers
| Name | Methyl disulfide |
| Synonyms | mds DMDS YWHAZ MGC138156 MGC126532 Sulfa-hitech Methyl disulfide Dimethyldisulfide Methyl disulphide Sulfa-hitech 0382 Dimethyl disulfide disulfuredemethyle Dimethyl disulphide methyldithiomethane (methyldisulfanyl)methane |
| CAS | 624-92-0 |
| EINECS | 210-871-0 |
| InChI | InChI=1/C2H6S2/c1-3-4-2/h1-2H3 |
| InChIKey | WQOXQRCZOLPYPM-UHFFFAOYSA-N |
624-92-0 - Physico-chemical Properties
| Molecular Formula | C2H6S2 |
| Molar Mass | 94.2 |
| Density | 1.0625 |
| Melting Point | -85 °C |
| Boling Point | 109°C(lit.) |
| Flash Point | 76°F |
| JECFA Number | 564 |
| Water Solubility | <0.1 g/100 mL at 20 ºC |
| Solubility | 2.7g/l |
| Vapor Presure | 22 mm Hg ( 20 °C) |
| Vapor Density | 3.24 (vs air) |
| Appearance | Liquid |
| Specific Gravity | 1.0647 (20/4℃) |
| Color | Clear yellow |
| Exposure Limit | ACGIH: TWA 0.5 ppm (Skin) |
| BRN | 1730824 |
| Storage Condition | Flammables area |
| Stability | Stable. Incompatible with strong bases, strong oxidizing agents, strong reducing agents. Flammable. |
| Explosive Limit | 1.1-16.1%(V) |
| Refractive Index | n20/D 1.525(lit.) |
| Physical and Chemical Properties | Light yellow transparent liquid. There is a bad smell. melting point -85 ℃ boiling point 109.7 ℃ relative density 1.0625 refractive index 1.5250 solubility insoluble in water, soluble in ethanol, ether, acetic acid was miscible. |
| Use | It is used as a solvent and pesticide intermediate, and is also the main raw material of methanesulfonyl chloride and methanesulfonic acid products. |
624-92-0 - Risk and Safety
| Risk Codes | R11 - Highly Flammable R20/22 - Harmful by inhalation and if swallowed. R36 - Irritating to the eyes R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R36/37/38 - Irritating to eyes, respiratory system and skin. R26 - Very Toxic by inhalation R22 - Harmful if swallowed R36/37 - Irritating to eyes and respiratory system. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S38 - In case of insufficient ventilation, wear suitable respiratory equipment. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S28A - S16 - Keep away from sources of ignition. S60 - This material and its container must be disposed of as hazardous waste. S57 - Use appropriate container to avoid environmental contamination. S39 - Wear eye / face protection. S29 - Do not empty into drains. |
| UN IDs | UN 2381 3/PG 2 |
| WGK Germany | 2 |
| RTECS | JO1927500 |
| TSCA | Yes |
| HS Code | 29309070 |
| Hazard Class | 3 |
| Packing Group | II |
| Toxicity | LD50 orally in Rabbit: 290 - 500 mg/kg |
624-92-0 - Upstream Downstream Industry
| Raw Materials | Sodium sulfide Sodium sulfide Sulfur(α) Dimethyl sulfate Dimethyl sulfate |
| Downstream Products | Methanesulfonic acid Methanesulfonyl chloride |
624-92-0 - Reference Information
Open Data Unverified Data
| FEMA | 3536 | DIMETHYL DISULFIDE |
| olfactory Threshold | 0.0022ppm |
| LogP | 1.91 at 20℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| toxicity | GRAS(FEMA). |
| usage limit | FEMA(mg/kg): baked goods 16.9; Frozen dairy products 4.8; Meat products 2.2; soft candy 9.4; Jelly and pudding 8.3; |
| Use | used as solvent and pesticide intermediates, fuel and lubricant additives, coking inhibitors of ethylene cracking furnace and oil refining unit, etc. used as solvents and pesticide intermediates, it is also the main raw material of methanesulfonyl chloride and methanesulfonic acid products. GB 2760-1996 specifies that food brush flavor is allowed to be used. dimethyl disulfide, also known as dimethyl disulfide, is used in the synthesis of the intermediate p-methylthio-m-cresol and p-methylthio-phenol, which is also used as a solvent, purification agent of the catalyst. It is used as a passivating agent for solvent and catalyst, pesticide intermediate, coking inhibitor, etc. Dimethyl disulfide reacts with cresol to form 2-methyl-4-hydroxyanisole, which is then condensed with O,O-dimethylsulfuryl phosphoryl chloride in an alkaline medium to give sesthion. It is a kind of high efficiency and low toxicity organic phosphorus insecticide, which has good control effect on rice borer, soybean borer and fly larvae. It can also be used as a veterinary drug to remove cattle larvae and cattle ticks. |
| production method | from the reaction of dimethyl sulfate and sodium disulfide. Sulfur powder was added into the sodium sulfide solution under stirring, and the temperature was raised to 80-90 ℃, the reaction was 1H, and the temperature was lowered to about 30 ℃. Dimethyl sulfate was dropped into the reaction vessel, and the reaction was continued for 2H, and then distilled, after the waste lye is separated, the product is obtained by distillation. dimethyl disulfide is industrially synthesized by the method of dimethyl sulfate. Na2S → Na2S2Na2S2 (CH3)2SO4 → CH3SSCH3 Na2SO4 put solid sodium sulfide and water into the reaction kettle, heat, control temperature 50~60 ℃, dissolve sodium sulfide, then add equimolar sulfur in batch, keep warm for 1H, cool to 45 ℃, start adding dimethyl sulfate Dropwise, keep the reaction temperature between 40~45 ℃, and keep warm for 1H after adding, the product can be distilled out of dimethyl disulfide. In addition, dimethyl disulfide can also be synthesized by a methyl mercaptan method. results from the reaction of iodomethyl magnesium and disulfide chloride. It is formed by the reaction of disodium disulfide and sodium methyl sulfate. Methyl thiosulfate was prepared by the reaction of methyl bromide and sodium thiosulfate, and then heated. |
| category | flammable liquid |
| toxicity grade | high toxicity |
| Acute toxicity | inhalation-rat LC50:16 mg/m3/2 hours; Inhalation-mouse LC50:12 mg/m3/2 h |
| flammability hazard characteristics | in case of fire, high temperature, oxidant flammable; |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Stored separately from oxidants and acids |
| extinguishing agent | dry powder, dry sand, carbon dioxide, foam, 1211 extinguishing agent |
| spontaneous combustion temperature | 304°C |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 21:40:26
624-92-0 - Nature
Open Data Verified Data
light yellow transparent liquid. Insoluble in water, with ethanol, ether, acetic acid miscible. There is a bad smell. The relative density is 1.0625 and the boiling point is 109.7 ℃. Melting Point -85 °c. Refractive index 5250.
Last Update：2024-01-02 23:10:35
624-92-0 - Preparation Method
Open Data Verified Data
derived from the interaction of dimethyl sulfate and sodium disulfide. Sulfur powder is added into the sodium sulfide solution under stirring, the temperature is raised to 80~90 ℃, the reaction is reduced to about 30 ℃; Dimethyl sulfate is dropped into the reaction vessel, the reaction is continued for 2H, and then distilled, after the waste lye is separated, the product is obtained by distillation.
Last Update：2022-01-01 10:37:33
624-92-0 - Use
Open Data Verified Data
This product is used as a solvent, Catalyst passivation agent, pesticide intermediate, Coke inhibitor, etc.
Last Update：2022-01-01 10:37:32
624-92-0 - Safety
Open Data Verified Data
- the mice inhaled 25mg/L 25min after death. The dead animals showed liver changes, renal congestion, bronchial pneumonia. Easy to make the central nervous system damage, but the toxicity is small. The operator should wear protective gear.
- This product is packaged in aluminum or polyethylene barrels. Aluminum barrels for lOOkg, polyethylene barrels for 3kg, 5kg or 20kg, stored in a cool, ventilated, dry place. Avoid high temperature.
Last Update：2022-01-01 10:37:33
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