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Dimethyl sulfide

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Dimethyl sulfide Basic information

Product Name:
Dimethyl sulfide
CAS:
75-18-3
MF:
C2H6S
MW:
62.13
EINECS:
200-846-2
Mol File:
75-18-3.mol
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Dimethyl sulfide Chemical Properties

Melting point:
−98 °C(lit.)
Boiling point:
38 °C(lit.)
Density 
0.846 g/mL at 25 °C(lit.)
vapor density 
2.1 (vs air)
vapor pressure 
26.24 psi ( 55 °C)
FEMA 
2746 | METHYL SULFIDE
refractive index 
n20/D 1.435(lit.)
Flash point:
−34 °F
storage temp. 
2-8°C
solubility 
Miscible with alcohols, ethers, esters, ketones, aliphatic and aromatic hydrocarbons. Slightly miscible with
form 
Liquid
color 
Clear colorless
Specific Gravity
0.849 (20/4℃)
Odor
Ethereal, permeating; disagreeable; offensive.
explosive limit
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 Reference
75-18-3(CAS DataBase Reference)
NIST Chemistry Reference
Dimethyl sulfide(75-18-3)
EPA Substance Registry System
Dimethyl sulfide (75-18-3)
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Safety Information

Hazard Codes 
F,Xn,Xi
Risk Statements 
11-22-37/38-41-36
Safety Statements 
7-9-16-29-33-36/39-26
RIDADR 
UN 1164 3/PG 2
WGK Germany 
1
RTECS 
PV5075000
13
Autoignition Temperature
402 °F
TSCA 
Yes
HSCode 
2930 90 98
HazardClass 
3
PackingGroup 
II
Hazardous Substances Data
75-18-3(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: 535 mg/kg LD50 dermal Rabbit > 5000 mg/kg

MSDS

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Dimethyl sulfide Usage And Synthesis

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.

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

Chemical Properties

Clear colorless liquid

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

Uses

Sulfiding agent.

Definition

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

Preparation

By reaction of potassium sulfide with methyl chloride in methanol solution; from potassium methyl sulfate and potassium sulfide

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.

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].

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.

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.

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.

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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Dimethyl sulfideSupplierMore

Shanghai Macklin Biochemical Co.,Ltd. Gold
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15221275939
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shenlinxing@macklin.cn
Shandong Ono Chemical Co., Ltd. Gold
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Changzhou Zidong Lianhua import and Export Co., Ltd Gold
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J & K SCIENTIFIC LTD.
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010-82848833- ;010-82848833-
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Meryer (Shanghai) Chemical Technology Co., Ltd.
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+86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
Email:
sh@meryer.com
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