Dimethylsulfid

Bezeichnung:Dimethylsulfid

CAS-Nr75-18-3

Englisch Name:Dimethyl sulfide

CBNumberCB6478393

SummenformelC2H6S

Molgewicht62.13

MOL-Datei75-18-3.mol

Synonyma

Dimethylsulfid

Thiobismethan

Methylsulfid

Dimethylsulfid physikalisch-chemischer Eigenschaften

Schmelzpunkt	−98 °C(lit.)
Siedepunkt	38 °C(lit.)
Dichte	0.846 g/mL at 25 °C(lit.)
Dampfdichte	2.1 (vs air)
Dampfdruck	26.24 psi ( 55 °C)
Brechungsindex	n20/D 1.435(lit.)
FEMA	2746 \| METHYL SULFIDE
Flammpunkt	−34 °F
storage temp.	Store at +2°C to +8°C.
Löslichkeit	Miscible with alcohols, ethers, esters, ketones, aliphatic and aromatic hydrocarbons.
Aggregatzustand	Liquid
Farbe	Clear colorless
Wichte	0.849 (20/4℃)
Geruch (Odor)	Ethereal, permeating; disagreeable; offensive.
Explosionsgrenze	2.2-19.7%(V)
Odor Threshold	0.003ppm
Geruchsart	sulfurous
JECFA Number	452
Merck	14,6123
BRN	1696847
Dielectric constant	6.3（20℃）
Expositionsgrenzwerte	ACGIH: TWA 10 ppm
Stabilität	Stable. Incompatible with strong oxidizing agents. Highly flammable - note low boiling point, low flash point, and wide explosion limits. Mixtures with air are potentially explosive. Incompatible with strong oxidizing agents. Use in UK regulated by LPG Regulations 1978 in accordance with HSE guidance note CS17.
InChIKey	QMMFVYPAHWMCMS-UHFFFAOYSA-N
LogP	0.89
CAS Datenbank	75-18-3(CAS DataBase Reference)
NIST chemische Informationen	Dimethyl sulfide(75-18-3)
EPA chemische Informationen	Dimethyl sulfide (75-18-3)

Sicherheit

Kennzeichnung gefährlicher	F,Xn,Xi
R-Sätze:	11-22-37/38-41-36
S-Sätze:	7-9-16-29-33-36/39-26
RIDADR	UN 1164 3/PG 2
WGK Germany	1
RTECS-Nr.	PV5075000
F	13
Selbstentzündungstemperatur	402 °F
TSCA	Yes
HS Code	2930 90 98
HazardClass	3
PackingGroup	II
Giftige Stoffe Daten	75-18-3(Hazardous Substances Data)
Toxizität	LD50 orally in Rabbit: 535 mg/kg LD50 dermal Rabbit > 5000 mg/kg

Gefahreninformationscode (GHS)

Dimethyl sulfide Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
FARBLOSE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
PHYSIKALISCHE GEFAHREN
Die Dämpfe sind schwerer als Luft und können sich am Boden ausbreiten. Fernzündung möglich.
CHEMISCHE GEFAHREN
Zersetzung beim Verbrennen unter Bildung giftiger und ätzender Rauche (Schwefeloxide). Reagiert sehr heftig mit Oxidationsmittelnunter Feuer- und Explosionsgefahr.
ARBEITSPLATZGRENZWERTE
TLV: 10 ppm (als TWA); (ACGIH 2008).
MAK: IIb (nicht festgelegt, aber Informationen vorhanden) (DFG 2008).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation der Dämpfe und durch Verschlucken.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20°C kann schnell eine gesundheitsschädliche Kontamination der Luft eintreten.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION:
Die Substanz reizt die Augen und die Haut.
LECKAGE
Gefahrenbereich verlassen! Fachmann zu Rate ziehen! Ausgelaufene Flüssigkeit in abdichtbaren Behältern sammeln. NICHT in die Kanalisation spülen. Persönliche Schutzausrüstung: Atemschutzfilter für organische Gase und Dämpfe.
R-Sätze Betriebsanweisung:
R11:Leichtentzündlich.
R22:Gesundheitsschädlich beim Verschlucken.
R37/38:Reizt die Atmungsorgane und die Haut.
R41:Gefahr ernster Augenschäden.
R36:Reizt die Augen.
S-Sätze Betriebsanweisung:
S7:Behälter dicht geschlossen halten.
S9:Behälter an einem gut gelüfteten Ort aufbewahren.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S29:Nicht in die Kanalisation gelangen lassen.
S33:Maßnahmen gegen elektrostatische Aufladungen treffen.
S36/39:Bei der Arbeit geeignete Schutzkleidung und Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Aussehen Eigenschaften
C2H6S; Methylsulfid. Farblose Flüssigkeit, übelriechend.
Gefahren für Mensch und Umwelt
Gesundheitsschädlich beim Verschlucken. Reizt die Augen und die Haut.
Dämpfe haben narkotische Wirkung.
Leichtentzündlich.
LD₅₀ (oral, Ratte): 535 mg/kg
Schutzmaßnahmen und Verhaltensregeln
Geeignete Schutzhandschuhe als kurzzeitiger Spritzschutz.
Verhalten im Gefahrfall
Mit flüssigkeitsbindendem Material aufnehmen. Der Entsorgung zuführen. Nachreinigen.
Kohlendioxid, Wasser.
Brennbar. Mit Luft Bildung explosionsfähiger Gemische möglich. Im Brandfall können Schwefeloxide freigesetzt werden.
Erste Hilfe
Nach Hautkontakt: Mit reichlich Wasser abwaschen.
Nach Augenkontakt: Bei geöffnetem Lidspalt mit reichlich fliessendem Wasser (Augendusche!) mindestens 15 Minuten ausspülen. Sofort Augenarzt hinzuziehen.
Nach Einatmen: Frischluft. Sofort Arzt hinzuziehen.
Nach Verschlucken: Reichlich Wasser trinken. Erbrechen auslösen. Sofort Arzt hinzuziehen.
Nach Kleidungskontakt: Kontaminierte Kleidung sofort entfernen.
Ersthelfer: siehe gesonderten Anschlag
Sachgerechte Entsorgung
Als halogenfreie, organische Lösemittelabfälle.
Beschreibung
Dimethyl sulfide, a sulfur ether compound, shares structural and property similarities with dimethyl ether. It is a colorless, volatile liquid that exhibits a distinct seafood-like odor. This compound is naturally generated through protein decomposition and serves as one of the culprits responsible for the fishy scent often associated with seafood.
Chemische Eigenschaften
Methyl sulfide, also known as Dimethyl sulfide, is a clear colorless volatile liquid that has an intense, unpleasant odor, wild radish, cabbage-like. It can be tolerated as a green vegetable note only at very low levels (0.1 - 3.0 ppm). Dimethyl sulfide is soluble in ethanol and ether, but insoluble in water.
Occurrence
Reported found in American peppermint oil, the oil of Algerian geranium, mint fractions, butter, orange, orange juice and grapefruit juice, black currant, berries, asparagus, kohlrabi, cabbage, carrot, celery, onion, garlic, peas, potato, rutabaga, sauerkraut, tomato, Scotch spearmint oil, parsley, wheat bread, many cheeses, yogurt, milk, cream, buttermilk, raw and cooked egg, fish, chicken, cooked beef, mutton, pork liver, hop oil, beer, cognac rum, grape wines, sherry, tea, roasted filberts and peanuts, oats, soybean, olive, beans, mushroom, starfruit, trassi, Bantu beer, macadamia nut, mango, cauliflower, Brussels sprouts, rice, sake, buckwheat, sweet corn, malt, wort, dried bonito, krill, shrimp, oysters, truffle, okra, crab, clam and scallop
Verwenden
Dimethyl sulfide undergoes thiolation reaction with hydrogen sulfide (H₂S) in the presence of tungsten-zirconia (WO₃/ZrO₂) catalyst to form methanethiol.
Verwenden
Dimethyl sulfide is used as a displaceable ligand in chloro(dimethyl sulfide)gold(I) and other coordination compounds, as a reducing agent in ozonolysis reactions as well as a food flavoring component. Further, it is utilized for the preparation of dimethyl sulfoxide, which is a common and important industrial solvent. It finds application in the petroleum industry.
synthetische
By reaction of potassium sulfide with methyl chloride in methanol solution; from potassium methyl sulfate and potassium sulfide
Definition
ChEBI: Dimethyl sulfide is a methyl sulfide in which the sulfur atom is substituted by two methyl groups. It is produced naturally by some marine algae. It has a role as a bacterial xenobiotic metabolite, a marine metabolite, an EC 3.5.1.4 (amidase) inhibitor, an algal metabolite and an Escherichia coli metabolite.
Aroma threshold values
Detection: 0.3 to 10 ppb. Aroma characteristics at 0.5%: sulfureous, dimethyl sulfide, creamy, tomato, fishy, scallop, berry fruity and vegetative nuances
Taste threshold values
Taste characteristics at 1 to 5 ppm: sulfureous, vegetative tomato, sweet, creamed corn, corn and asparagus with a dairy creaminess and a slight minty afternote, alliaceous.
Allgemeine Beschreibung
A clear colorless to straw colored liquid with a disagreeable odor. Flash point less than 0°F. Less dense than water and slightly soluble in water. Vapors are heavier than air.
Air & Water Reaktionen
Highly flammable. Slightly soluble in water.
Reaktivität anzeigen
Organosulfides, such as Dimethyl sulfide, are incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials generate heat and in many cases hydrogen gas. Many of these compounds may liberate hydrogen sulfide upon decomposition or reaction with an acid. Dimethyl sulfide rapidly decomposes dibenzoyl peroxide explosively in the absence of solvent, [J. Org. Chem., 1972, 37, 2885]. The sulfide also decomposes xenon difluoride explosively at ambient temps, [J, Chem Soc., 1984, 2827]. Interaction of Dimethyl sulfide and oxygen is explosive at 210°C and above, [Atmos. Environ., 1967, 1, 491-497]. A delayed explosion occurred in a system containing nitric acid, Dimethyl sulfide, and 1, 4-dioxane, even with cooling with liquid nitrogen, [Chem. Abs., 1972, 76, 13515].
Health Hazard
Inhalation causes moderate irritation of upper respiratory system. Contact of liquid with eyes causes moderate irritation. Repeated contact with skin may extract oils and result in irritation. Ingestion causes nausea and irritation of mouth and stomach.
Sicherheitsprofil
Poison by inhalation. Moderately toxic by ingestion. A skin and severe eye irritant. A very dangerous fire hazard when exposed to heat or flame. Explosive in the form of vapor when exposed to heat or flame. Can react vigorously with oxidizing materials. To fight fire, use CO2, dry chemical. When heated to decomposition it emits highly toxic fumes of SOx and may explode. See also SULFIDES.
mögliche Exposition
It is used as a presulfiding agent forvariety of catalysts used by petroleum industry; a gas odorant; catalyst impregnator; as a solvent for anhydrous mineral salts; a chemical intermediate for solvents and dimethylsulfoxide; as a flavoring ingredient in foods and beve
Erste Hilfe
If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit.
Lager
Color Code—Red: Flammability Hazard: Store ina flammable liquid storage area or approved cabinet awayfrom ignition sources and corrosive and reactive materials.Prior to working with dimethyl sulfide you should betrained on its proper handling and storage. Before enteringconfined space where this chemical may be present, checkto make sure that an explosive concentration does not exist.Store in tightly closed containers in a cool, well-ventilatedarea. Metal containers involving the transfer of this chemical should be grounded and bonded. Where possible, automatically pump liquid from drums or other storagecontainers to process containers. Drums must be equippedwith self-closing valves, pressure vacuum bungs, and flamearresters. Use only nonsparking tools and equipment, especially when opening and closing containers of this chemical. Sources of ignition, such as smoking and open flames,are prohibited where this chemical is used, handled, orstored in a manner that could create a potential fire orexplosion hazard. Wherever this chemical is used, handled,manufactured, or stored, use explosion-proof electricalequipment and fittings.
Versand/Shipping
This compound requires a shipping label of“FLAMMABLE LIQUID.” It falls in Hazard Class 3 andPacking Group II.
läuterung methode
Purify dimethyl sulfide via the Hg(II) chloride complex by dissolving 1 mole of Hg(II)Cl2 in 1250mL of EtOH and slowly adding the boiling alcoholic solution of Me2S to give the right ratio for 2(CH3)2S.3HgCl2. After recrystallisation of the complex to constant melting point, 500g of complex is heated with 250mL conc HCl in 750mL of water. The sulfide is separated, washed with water, and dried with CaCl2 and CaSO4. Finally, it is distilled under reduced pressure from sodium. Precautions should be taken (efficient fume hood) because of its very UNPLEASANT ODOUR.[Beilstein 1 IV 1275.]
Inkompatibilitäten
Reacts violently with strong ox

Dimethyl sulfide Upstream-Materialien And Downstream Produkte

Dimethylsulfid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

75-18-3, Dimethyl sulfide Verwandte Suche:

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