Dimethyl Sulfide

Product Name:

Dimethyl sulfide

Synonymer:

Dimetylsulfid (99%, HyDry, Waterâ p50 ppm (av KF)); Dimetylsulfid (99%, HyDry, med molekylsikt, Waterâ ¤ ¤50 ppm (av KF)); fide; metantiometan; MethylMonosulfide; methylmonosulfide; Sulfide , metyl-; sulfurede metyle

CAS:

75-18-3

MF:

C2H6S

MW:

62.13

EINECS:

200-846-2

Produkt kategorier:

Sulfidesmaker; Allium cepa (løk); Allium sativum (hvitløk); Byggesteiner; Kjemisk syntese; Ernæringsforskning; Organiske byggesteiner; Fytokjemikalier etter plante (mat / krydder / urt); sulfider / disulfider; svovelforbindelser; bioaktive små molekyler; Cellebiologi; DIG-DY; ravglassflasker; organiske stoffer; sulfidaroma; reagens; løsemiddelflasker; alternativer for løsningsmiddelemballasje; løsningsmidler; løsningsmiddel

Mol-fil:

75-18-3.mol

Melting point 

−98 ° C (lys.)

Kokepunkt

38 °C(lit.)

tetthet

0,846 g / ml ved 25 ° C (opplyst)

damptetthet

2.1 (mot luft)

vapor pressure 

55 ° C (26,24 psi)

FEMA 

2746 | METHYLSULFIDE

brytningsindeks

n20 / D 1.435 (lys)

Fp 

−34 °F

lagringstemperatur

2-8°C

løselighet

Blandbar med alkoholer, etere, estere, ketoner, alifatiske og aromatiske hydrokarboner. Lett blandbar med

form 

Liquid

color 

Clear colorless

Specific Gravity

0,849 (20/4â „ƒ)

Odor

Ethereal, gjennomsyrer; ubehagelig; støtende.

Luktterskel

0.003ppm

eksplosjonsgrense

2.2-19.7%(V)

Merck 

14,6123

JECFA Number

452

BRN

1696847

Stability:

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

CAS DataBase Referanse

75-18-3(CAS DataBase Reference)

NIST Chemistry Reference

Dimethyl sulfide(75-18-3)

EPA Substance Registry System

Dimethyl sulfide (75-18-3)

Hazard Codes 

F, Xn, Xi

Risk Statements 

11-22-37/38-41-36

Sikkerhetserklæringer

7-9-16-29-33-36 / 39-26

RIDADR

UN 1164 3 / PG 2

WGK Germany 

1

RTECS

PV5075000

F

13

Autoignition Temperature

402 ° F

TSCA

Ja

HS kode

2930 90 98

HazardClass 

3

PackingGroup 

II

Data om farlige stoffer

75-18-3 (data om farlige stoffer)

Toxicity

LD50 oralt i kanin: 535 mg / kg LD50 hud Kanin> 5000 mg / kg

Description

Metylsulfid har en ubehagelig lukt av vill reddik som er kålaktig. Det kan tolereres som et notat for grønne grønnsaker bare ved svært lave nivåer (0,1 - 3,0 ppm). Det kan produseres ved omsetning av kaliumsulfid med metylklorid i metanoløsningen; fra kaliummetylsulfat og kaliumsulfid.

Kjemiske egenskaper

Methyl sulfide 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 to 3.0 ppm

Kjemiske egenskaper

Clear colorless liquid

Uses

Sulfiderende middel.

Definition

ChEBI: A methyl sulfide in which the sulfur atom is substituted by two methyl groups. It is produced naturally by some marine algae.

Forberedelse

By reaction of potassium sulfide with methyl chloride in methanol solution; from potassium methyl sulfate and potas[1]sium sulfide

Aroma threshold values

Deteksjon: 0,3 til 10 ppm. Aromaegenskaper ved 0,5%: svovelholdig, dimetylsulfid, kremaktig, tomat, fiskaktig, kamskjell, bærfruktig og vegetativ nyanser

Smakterskelverdier

Smakskarakteristika ved 1 til 5 ppm: svovelholdig, vegetativ tomat, søt, kremcorn, mais og asparges med melkekrem og en liten myntefterten, alliaceous.

General Description

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 Reactions

Highly flammable. Slightly soluble in water.

Reactivity Profile

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].

Helserisiko

Innånding forårsaker moderat irritasjon av øvre luftveier. Kontakt med væske med øyne forårsaker moderat irritasjon. Gjentatt hudkontakt kan trekke ut oljer og føre til irritasjon. Svelging forårsaker kvalme og irritasjon i munnen og magen.

Kjemisk reaktivitet

Reaktivitet med vann: Ingen reaksjon; Reaktivitet med vanlige materialer: Ingen reaksjon; Stabilitet Under transport: Stabil; Nøytraliserende midler for syrer og etsende stoffer: Notpertinent; Polymerisering: Ikke relevant; Inhibitor of Polymerization: Notpertinent.

Safety Profile

Gift ved inhalering. Moderat giftig ved svelging. En hud og alvorlig øyeirriterende. Svært farlig brannfare ved eksponering for varme eller flamme. Eksplosivt i form av damp når det utsettes for varme eller flamme. Kan reagere kraftig med oksiderende materialer. For å bekjempe brann, bruk CO2, tørre kjemikalier. Ved oppvarming til nedbrytning avgir den svært giftige røyk av SOx og kan eksplodere. Se også SULFIDER.

Purification Methods

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.]

Råvarer

Dimetylsulfat -> Karbondisulfid -> Aluminiumoksid -> VÆSESULFID -> Natriumtiometoksyd -> LIGNIN, ALKALI -> ANIONSTANDARD - SULFAT

Forberedelsesprodukter

Dimethyl sulfoxide-->Dimethoate-->3-FURANMETHANOL-->ETHYL 3-FUROATE-->Parathion-methyl-->Ketorolac-->O,O-Dimethyl S-methylcarbamoylmethyl phosphorothioate-->Malathion-->Fluorescent Brightener 185-->Ethyl 5-[3-(4,6-dimethoxy pyrimidyl-2-yl)ureido]methylpyrazolyl-4-carboxylic ester-->Pazufloxacin-->Fenitrothion-->Methidathion-->Orthene-->Fipronil-->FENOTHIOCARB-->Phosmet-->4-AMINO-2-METHYLSULFANYL-PYRIMIDINE-5-CARBOXYLIC ACID ETHYL ESTER-->Dimethylphosphorodithioate-->Dimethyl chlorothiophosphate-->ISOFENPHOS-->CYANOPHOS-->5-HYDROXYMETHYLCYTOSINE-->Azamethiphos-->WL 108477-->CARBOPHENOTHION-->4-AMINO-2-(METHYLTHIO)PYRIMIDINE-5-CARBOXYLIC ACID-->4-AMINO-2-(METHYLTHIO)-6-PYRIMIDINOL-->Ranitidine hydrochloride-->Aminoguanidinium sulphate-->Mifepristone-->5-CARBOXYCYTOSINE-->Methyl [(dimethoxyphosphinothioyl)thio]acetate-->FLOSEQUINAN-->Procarbazone sodium-->Fluticasone propionate-->Ammonium O,O-dimethyl dithiophosphate-->CHLOROMETHYL METHYL SULFIDE-->4-Methylthio-4-methyl-2-pentanone