Dimethyldisulfid Produkt Beschreibung

Dimethyl disulfide Struktur
624-92-0
  • CAS-Nr.624-92-0
  • Bezeichnung:Dimethyldisulfid
  • Englisch Name:Dimethyl disulfide
  • Synonyma:Dimethyldisulfid;Methyldisulfid;Methyldithiomethan
    mds;DMDS;143F;MDCR;143E;143B;YWHAZ;YWHAG;YWHAE;1433B
  • CBNumber:CB8229876
  • Summenformel:C2H6S2
  • Molgewicht:94.2
  • MOL-Datei:624-92-0.mol
Dimethyldisulfid physikalisch-chemischer Eigenschaften
  • Schmelzpunkt: :-85 °C
  • Siedepunkt: :109 °C(lit.)
  • Dichte :1.0625
  • Dampfdichte :3.24 (vs air)
  • Dampfdruck :22 mm Hg ( 20 °C)
  • Brechungsindex :n20/D 1.525(lit.)
  • FEMA  :3536 | DIMETHYL DISULFIDE
  • Flammpunkt: :76 °F
  • storage temp.  :Flammables area
  • Löslichkeit :2.7g/l
  • Aggregatzustand :Liquid
  • Wichte :1.0647 (20/4℃)
  • Farbe :Clear yellow
  • Explosionsgrenze :1.1-16.1%(V)
  • Odor Threshold :0.0022ppm
  • Wasserlöslichkeit :<0.1 g/100 mL at 20 ºC
  • JECFA Number :564
  • BRN  :1730824
  • Stabilität: :Stable. Incompatible with strong bases, strong oxidizing agents, strong reducing agents. Flammable.
  • InChIKey :WQOXQRCZOLPYPM-UHFFFAOYSA-N
  • CAS Datenbank :624-92-0(CAS DataBase Reference)
  • NIST chemische Informationen :Disulfide, dimethyl(624-92-0)
  • EPA chemische Informationen :Methyl disulfide (624-92-0)
Sicherheit

Dimethyl disulfide Chemische Eigenschaften,Einsatz,Produktion Methoden

  • ERSCHEINUNGSBILD FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
  • CHEMISCHE GEFAHREN Zersetzung beim Verbrennen unter Bildung giftiger und ätzender Rauche mit Schwefeloxiden. Reagiert sehr heftig mit Oxidationsmitteln.
  • ARBEITSPLATZGRENZWERTE TLV: 0.5 ppm (als TWA); Hautresorption (ACGIH 2008).
    MAK nicht festgelegt.
  • AUFNAHMEWEGE Aufnahme in den Körper durch Inhalation und durch Verschlucken.
  • INHALATIONSGEFAHREN Nur ungenügende Angaben vorhanden über die Geschwindigkeit, mit der eine gesundheitsschädliche Konzentration in der Luft beim Verdampfen bei 20°C erreicht wird.
  • WIRKUNGEN BEI KURZZEITEXPOSITION WIRKUNGEN BEI KURZZEITEXPOSITION:
    Die Substanz reizt leicht die Haut und reizt die Augen und die Atemwege. Möglich sind Auswirkungen auf das Zentralnervensystem.
  • LECKAGE Gefahrenbereich verlassen! Fachmann zu Rate ziehen! Persönliche Schutzausrüstung: Atemschutzfilter für organische Gase und Dämpfe. Belüftung. Zündquellen entfernen. Ausgelaufene Flüssigkeit in abdichtbaren Behältern sammeln.
  • R-Sätze Betriebsanweisung: R11:Leichtentzündlich.
    R20/22:Gesundheitsschädlich beim Einatmen und Verschlucken.
    R36:Reizt die Augen.
    R51/53:Giftig für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.
    R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
    R26:Sehr giftig beim Einatmen.
    R22:Gesundheitsschädlich beim Verschlucken.
  • S-Sätze Betriebsanweisung: S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
    S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
    S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
    S38:Bei unzureichender Belüftung Atemschutzgerät anlegen.
    S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
    S16:Von Zündquellen fernhalten - Nicht rauchen.
    S60:Dieses Produkt und sein Behälter sind als gefährlicher Abfall zu entsorgen.
  • Beschreibung Methyl disulfide has a diffuse intense onion odor. It is nonlachrymatory. May be prepared from magnesium methyl iodide and S2C12, or from Na2S2 and sodium methyl sulfate; also from methyl bromide and sodium thiosulfate, after which the resulting sodium methylthiosulfate is heated to yield dimethyl disulfide.
  • Chemische Eigenschaften Methyl disulfide has a diffuse, intense onion odor. This compound is nonlacrimatory
  • Chemische Eigenschaften colourless to yellow liquid with a very unpleasant smell
  • Occurrence Reported found in sour cherry, guava, melon, peach, pineapple, strawberry, cabbage, kohlrabi, onion, garlic, shallot, leek, chive, peas, potato, rutabaga, tomato, parsley, breads, many cheeses, yogurt, milk, egg, fish, meats, hop oil, beer, Scotch whiskey, cognac, grape wines, cocoa, coffee, peanut, peanut butter, pecan, potato chips, oats, soybean, beans, mushrooms, trassi, macadamia nut, mango, cauliflower, broccoli, brussels sprouts, rice, radish, sukiyaki, sake, watercress, malt, wort, krill, southern pea, loquat, sapodilla, shrimp, oyster, crab, crayfish, clam, scallops and squid.
  • Verwenden Methyl disulfide is probably best known for its use as a component of flavoring materials. It has an intense onion odor by itself. Ironically, although many find its odor objectionable at high concentrations as noted above, when diluted, its aroma has also been described as pleasant. Methyl disulfide is often used in combination with other flavor compounds in food products, including baked goods, cheese, frozen dairy products, meat products, soups, savory flavors, fruit flavors, soft candy, gelatin, puddings, and both alcoholic and nonalcoholic beverages.
    Industrially, methyl disulfide is also used as a sulfiding agent to catalyze reactions in oil refineries and other industries. It has a low flash point of 16 ℃ (61 °F) that presents fire hazards during refinery usage. Due to its strong odor and low flash point, methyl disulfide typically requires storage under nitrogen pressure in closed containers.
    Other novel applications are being explored, including inclusion of methyl disulfide in insect trap baiting products to attract biting flies and mosquitos. It is also proposed as an insecticidal fumigant substitute for methyl bromide. Methyl disulfide formed during irradiation of foods also has potential to be used as irradiation detection marker for frozen-stored meats under oxygen-permeable packaging conditions. Among sulfur volatiles, only methyl disulfide was found in meat after 6 months of storage at -40 ℃ (40 °F). Methyl disulfide is also being studied as a signaling molecule in marine ecosystems to study effects of climate change.
  • synthetische From magnesium methyl iodide and S2Cl2, or from S2S2 and sodium methyl sulfate; also from methyl bromide and sodium thiosulfate, after which the resulting sodium methylthiosulfate is heated to yield dimethyl disulfide.
  • Definition ChEBI: An organic disulfide that is methane in which one of the hydrogens has been replaced by a methyldisulfanyl group.
  • Aroma threshold values Detection: 0.16 to 1.2 ppb. Recognition: 90 ppb
  • Allgemeine Beschreibung A colorless oily liquid with a garlic-like odor. Denser than water and slightly soluble in water. Flash point 40°F. Vapors heavier than air. May irritate skin and eyes. Used to make other chemicals.
  • Air & Water Reaktionen Highly flammable. Slightly soluble in water.
  • Reaktivität anzeigen DMDS is a reducing agent. A dangerous fire hazard when exposed to oxidizing materials. Emits toxic fumes of oxides of sulfur when heated to decomposition or on contact with acids [Sax, 9th ed., 1996, p. 1320].
  • Health Hazard May cause toxic effects if inhaled or absorbed through skin. Inhalation or contact with material may irritate or burn skin and eyes. Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.
  • Brandgefahr HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
  • Sicherheitsprofil Poison by inhalation. A very dangerous fire hazard when exposed to heat, flame, or oxidzers. Can react vigorously with oxiduing materials. See also SULFIDES.
  • Environmental Fate Naturally occurring methyl disulfide is present in small amounts throughout the natural environment. Accidental releases of larger quantities of methyl sulfide from industrial processes can also potentially enter the environment as liquid or vapor. It is immiscible with water, so it is unlikely to be found in high concentrations in water supplies, but it is miscible with most common organic solvents.
    The Hazardous Substances Data Bank (HSDB) provides a good, detailed explanation of environmental fate. When released to air, a vapor pressure of 28.7mmHg at 25 ℃ indicates that methyl disulfide will exist as a vapor in the ambient atmosphere. Vapor-phase methyl disulfide is degraded in the atmosphere by reaction with photochemically produced hydroxyl radicals. The half-life for this reaction in air is estimated to be 4 h. Direct photolysis (half-life of 3.2–4.6 h at full sunlight) and reaction with nitrate radicals (half-life of 1.1 h during night-time hours) will also contribute to its atmospheric degradation.
    If released to soil, methyl disulfide is expected to have moderate mobility based upon an estimated Koc of 220. In water, methyl disulfide is not expected to adsorb to suspended solids and sediment in water based on its Koc value. In both soil and water, volatilization to the atmosphere is expected to be the major transport process, based on a Henry’s law constant of 1.21× 10–3 atm-m3 mol–1. Estimated volatilization half-lives for a model river and model lake are 3 h and 4 days, respectively. Volatilization from dry soil surfaces is possible given the vapor pressure of this compound. Since methyl disulfide photolyzes readily in sunlight, photodegradation on soil or water surfaces exposed to sunlight could be an important transformation process. Other than photodegradation, because it is such a stable molecule, methyl disulfide is not readily biodegradable by microorganisms and therefore can be relatively persistent in the environment. Although limited biodegradation data suggest that methyl disulfide can biodegrade, insufficient data are available to predict its relative environmental importance in soil or water. An estimated bioconcentration factor (BCF) of 13 suggests the potential for bioconcentration in aquatic organisms is low.
  • läuterung methode Pass it through neutral alumina before use. [Trost Chem Rev 78 363 1978, Beilstein 1 IV 1281.]
  • Toxicity evaluation Very little information is available on mechanism of toxicity. Although the authors of one experimental animal study suggested that methyl disulfide toxicity resembles that of hydrogen sulfide, it is not at all clear that cytochrome oxidase inhibition can result from methyl disulfide exposure. Mechanistically hydrogen sulfide is classified as a chemical asphyxiant because of its known ability to disrupt electron transport and oxidative phosphorylation by interaction with the enzyme cytochrome oxidase. Other sources classify methyl disulfide a simple asphyxiant, which means that it is nonreactive with enzymes or other cell components and simply displaces oxygen in the air. Some information indicates that neurotoxicity to insects results when methyl disulfide disrupts calcium-activated potassium channels in insect pacemaker neurons.
Dimethyl disulfide Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
Dimethyldisulfid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.
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624-92-0, Dimethyl disulfide Verwandte Suche:
  • MGC126532
  • MGC138156
  • YWHAZ
  • disulfuredemethyle
  • mds
  • methyldithiomethane
  • Sulfa-hitech
  • Sulfa-hitech 0382
  • DIMETHYL DISULPHIDE
  • DIMETHYL DISULFIDE
  • DMDS
  • FEMA 3536
  • 143F
  • Anti-14-3-3 η antibody produced in rabbit
  • Protein AS1
  • Protein kinase C inhibitor protein-1
  • 14-3-3 Gamma, histidine-tagged human
  • Tyrosine 3-monooxygtenase/tryptophan 5-monooxygenase activation protein, gamma isoform
  • YWHAG
  • 14-3-3 Epsilon histidine-tagged human
  • FLJ45465
  • KCIP-1
  • MDCR
  • Tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein, epsilon polypeptide
  • YWHAE
  • 14-3-3 protein Zeta
  • 14-3-3 Zeta, histidine-tagged human
  • 143E
  • Anti-14-3-3 ω, C-Terminal antibody produced in rabbit
  • Mitochondrial import stimulation factor L subunit
  • 14-3-3 protein gamma-1
  • ANTI-DANRE YWHAG1 (CENTER) antibody produced in rabbit
  • ywhag1
  • 1433B
  • 143B
  • Protein 1054
  • 14-3-3 ζ, GST tagged human
  • MGC111427
  • METHYL DISULFIDE
  • METHYL DISULPHIDE
  • 2,3-DITHIABUTANE
  • DiMethyl disul
  • (CH3S)2
  • (Methyldisulfanyl)methane
  • (Methyldithio)methane
  • 2,3-dithiobutane
  • ai3-25305
  • dimethyldisulfane
  • Disulfide,dimethyl
  • disulfide,dimethyl-
  • disulfurededimethyle
  • Dimethyldisufide
  • METHYL DISULFIDE, 99.0+%, A PRODUCT OF E LF ATOCHEM
  • DIMETHYL DISULFIDE 98+%
  • METHYL DISULFIDE, 99+% (DMDS) (WORLDWIDE
  • DIMETHYL DISULFIDE(DMDSDMS)
  • Dimethyldisulfide,99%
  • DIMETHYL DISULFIDE/DMDS