624-92-0 - Names and IdentifiersNameMethyl disulfideSynonymsmdsDMDSYWHAZMGC138156MGC126532Sulfa
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| Nome | Methyl disulfide |
| Sinonimi | 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 |
| Formula molecolare | C2H6S2 |
| massa molare | 94.2 |
| Densità | 1.0625 |
| Punto di fusione | -85 °C |
| punto Boling | 109°C(lit.) |
| Punto Flash | 76°F |
| JECFA Number | 564 |
| Solubilità in acqua | <0.1 g/100 mL at 20 ºC |
| Solubilità | 2.7g/l |
| Pressione del vapore | 22 mm Hg ( 20 °C) |
| Vapor Density | 3.24 (vs air) |
| Aspetto | Liquido |
| Gravità specifica | 1.0647 (20/4℃) |
| Colore | Clear yellow |
| Limite di esposizione | ACGIH: TWA 0.5 ppm (Skin) |
| BRN | 1730824 |
| Condizioni di conservazione | Area infiammabili |
| Stabilità | Stable. Incompatible with strong bases, strong oxidizing agents, strong reducing agents. Flammable. |
| Limite esplosivo | 1.1-16.1%(V) |
| Indice di rifrattività | n20/D 1.525(lit.) |
| Proprietà fisiche e chimiche | 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. |
| Utilizzo | It is used as a solvent and pesticide intermediate, and is also the main raw material of methanesulfonyl chloride and methanesulfonic acid products. |
| Codici di rischio | R11 - Highly Flammable R20/22 - Harmful by inhalation and if swallowed. R36 - Irritante per gli occhi R51/53 Tossico per gli organismi acquatici, può causare effetti avversi a lungo termine nell'ambiente acquatico. R36/37/38 - Irritante per gli occhi, il sistema respiratorio e la pelle. R26 - Very Toxic by inhalation R22 - Nocoso se ingoiato R36/37 - Irritating to eyes and respiratory system. |
| Descrizione della sicurezza | S26 In caso di contatto con gli occhi, risciacquare immediatamente con abbastanza acqua e richiedere consulenza medica. S61 - Evitare il rilascio nell'ambiente. Fare riferimento alle istruzioni speciali / schede dati di sicurezza. S45 In caso di incidente o se si sente male, richiedere immediatamente consulenza medica (mostrare l’etichetta quando possibile). S38 - In case of insufficient ventilation, wear suitable respiratory equipment. S36/37/39 - Indossare indumenti protettivi adatti, guanti e protezione occhi/viso. S28A - S16 - Tenere lontano da fonti di accensione. 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. |
| ID delle Nazioni Unite | UN 2381 3/PG 2 |
| WGK Germania | 2 |
| RTECS | JO1927500 |
| TSCA | Sì |
| Codice HS | 29309070 |
| Classe di pericolo | 3 |
| Gruppo imballaggio | II |
| Tossicità | LD50 orally in Rabbit: 290 - 500 mg/kg |
| Raw Materials | Sodium sulfide Sodium sulfide Sulfur(α) Dimethyl sulfate Dimethyl sulfate |
| Downstream Products | Methanesulfonic acid Methanesulfonyl chloride |
in case of acid or high heat decomposition of toxic sulfur oxide gas
| FEMA | 3536 | DIMETHYL DISULFIDE |
| olfactory Threshold | 0.0022ppm |
| LogP | 1.91 at 20℃ |
| 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; |
| Utilizzo | 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. |
| metodo di produzione | 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. |
| categoria | flammable liquid |
| grado di tossicità | tossicità elevata |
| Tossicità acuta | inhalation-rat LC50:16 mg/m3/2 hours; Inhalation-mouse LC50:12 mg/m3/2 h |
| Caratteristiche di rischio di infiammabilità | in case of fire, high temperature, oxidant flammable; |
| Caratteristiche di stoccaggio e trasporto | The warehouse is ventilated and dried at low temperature; Stored separately from oxidants and acids |
| agente estinguente | dry powder, dry sand, carbon dioxide, foam, 1211 extinguishing agent |
| temperatura di combustione spontanea | 304°C |
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