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Product Name: |
Dimethyl sulfide |
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Synonyms: |
Dimethyl sulfide( 99%, HyDry, Water≤50 ppm (by K.F.));Dimethyl sulfide( 99%, HyDry, with molecular sieves, Water≤50 ppm (by K.F.));fide;methanethiomethane;Methyl Monosulfide;methylmonosulfide;Sulfide, methyl-;Sulfure de methyle |
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CAS: |
75-18-3 |
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MF: |
C2H6S |
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MW: |
62.13 |
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EINECS: |
200-846-2 |
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Product Categories: |
Sulfides flavors;Allium cepa (Onion);Allium sativum (Garlic);Building Blocks;Chemical Synthesis;Nutrition Research;Organic Building Blocks;Phytochemicals by Plant (Food/Spice/Herb);Sulfides/Disulfides;Sulfur Compounds;Bioactive Small Molecules;Cell Biology;DIG-DY;Amber Glass Bottles;Organics;sulfide Flavor;Reagent;Solvent Bottles;Solvent Packaging Options;Solvents;solvent |
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Mol File: |
75-18-3.mol |
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Melting point |
−98 °C(lit.) |
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Boiling point |
38 °C(lit.) |
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density |
0.846 g/mL at 25 °C(lit.) |
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vapor density |
2.1 (vs air) |
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vapor pressure |
26.24 psi ( 55 °C) |
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FEMA |
2746 | METHYL SULFIDE |
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refractive index |
n20/D 1.435(lit.) |
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Fp |
−34 °F |
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storage temp. |
2-8°C |
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solubility |
Miscible with alcohols, ethers, esters, ketones, aliphatic and aromatic hydrocarbons. Slightly miscible with |
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form |
Liquid |
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color |
Clear colorless |
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Specific Gravity |
0.849 (20/4℃) |
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Odor |
Ethereal, permeating; disagreeable; offensive. |
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Odor Threshold |
0.003ppm |
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explosive limit |
2.2-19.7%(V) |
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Merck |
14,6123 |
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JECFA Number |
452 |
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BRN |
1696847 |
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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. |
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InChIKey |
QMMFVYPAHWMCMS-UHFFFAOYSA-N |
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CAS DataBase Reference |
75-18-3(CAS DataBase Reference) |
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NIST Chemistry Reference |
Dimethyl sulfide(75-18-3) |
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EPA Substance Registry System |
Dimethyl sulfide (75-18-3) |
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Hazard Codes |
F,Xn,Xi |
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Risk Statements |
11-22-37/38-41-36 |
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Safety Statements |
7-9-16-29-33-36/39-26 |
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RIDADR |
UN 1164 3/PG 2 |
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WGK Germany |
1 |
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RTECS |
PV5075000 |
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F |
13 |
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Autoignition Temperature |
402 °F |
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TSCA |
Yes |
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HS Code |
2930 90 98 |
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HazardClass |
3 |
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PackingGroup |
II |
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Hazardous Substances Data |
75-18-3(Hazardous Substances Data) |
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Toxicity |
LD50 orally in Rabbit: 535 mg/kg LD50 dermal Rabbit > 5000 mg/kg |
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Description |
Methyl sulfide has an unpleasant odor of wild radish that is cabbage- like. It can be tolerated as a green vegetable note only at very low levels (0.1 - 3.0 ppm). It may be produced by reaction of potassium sulfide with methyl chloride in methanol solution; from potassium methyl sulfate and potassium sulfide. |
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Chemical Properties |
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 |
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Chemical Properties |
Clear colorless liquid |
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Uses |
Sulfiding agent. |
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Definition |
ChEBI: A methyl sulfide in which the sulfur atom is substituted by two methyl groups. It is produced naturally by some marine algae. |
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Preparation |
By reaction of potassium sulfide with methyl chloride in methanol solution; from potassium methyl sulfate and potas[1]sium sulfide |
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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 |
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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. |
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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. |
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Air & Water Reactions |
Highly flammable. Slightly soluble in water. |
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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]. |
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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. |
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Chemical Reactivity |
Reactivity with Water : No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent. |
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Safety Profile |
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. |
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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.] |
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Raw materials |
Dimethyl sulfate-->Carbon disulphide-->Aluminum oxide-->HYDROGEN SULFIDE-->Sodium thiomethoxide-->LIGNIN, ALKALI-->ANION STANDARD - SULFATE |
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Preparation Products |
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 |
