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Dimethyl sulfide

CAS No.75-18-3
Chemical Name:Dimethyl sulfide
CBNumber:CB6478393
Molecular Formula:C2H6S
Formula Weight:62.13
MOL File:75-18-3.mol

Dimethyl sulfide Property

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)
refractive index n20/D 1.435(lit.)
FEMA 2746 | METHYL SULFIDE
Flash point −34 °F
storage temp. Store at +2°C to +8°C.
solubility Miscible with alcohols, ethers, esters, ketones, aliphatic and aromatic hydrocarbons.
form Liquid
Specific Gravity 0.849 (20/4℃)
color Clear colorless
Odor Ethereal, permeating; disagreeable; offensive.
Odor Threshold 0.003ppm
explosive limit 2.2-19.7%(V)
Odor Type sulfurous
biological source synthetic
Water Solubility water: soluble 7.28g/L at20°C
JECFA Number 452
Merck 14,6123
BRN 1696847
Dielectric constant 6.3（20℃）
Exposure limits ACGIH: TWA 10 ppm
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
LogP 0.89
Substances Added to Food (formerly EAFUS) METHYL SULFIDE
FDA 21 CFR 172.515
CAS DataBase Reference 75-18-3(CAS DataBase Reference)
EWG's Food Scores 2
FDA UNII QS3J7O7L3U
NIST Chemistry Reference Dimethyl sulfide(75-18-3)
EPA Substance Registry System Dimethyl sulfide (75-18-3)
UNSPSC Code 85151701
NACRES NA.24

Safety

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
F :13
Autoignition Temperature :402 °F
TSCA :Yes
HS Code :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

NFPA 704:

	4
2		0

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal wordDanger
Hazard statements H225
Precautionary statements P210-P233-P240-P241-P242-P243

Dimethyl sulfide Price More Price(27)

Brand: Sigma-Aldrich(India)
Product number: W274623
Product name : Dimethyl sulfide
Purity: natural, ≥99%, FCC, FG
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Brand: Sigma-Aldrich(India)
Product number: W274623
Product name : Dimethyl sulfide
Purity: natural, ≥99%, FCC, FG
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Brand: Sigma-Aldrich(India)
Product number: W274623
Product name : Dimethyl sulfide
Purity: natural, ≥99%, FCC, FG
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Brand: Sigma-Aldrich(India)
Product number: W274623
Product name : Dimethyl sulfide
Purity: natural, ≥99%, FCC, FG
Packaging: 1KG
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Brand: Sigma-Aldrich(India)
Product number: W274615
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Dimethyl sulfide Chemical Properties,Usage,Production

Description 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.
Chemical Properties 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.
Uses Dimethyl sulfide undergoes thiolation reaction with hydrogen sulfide (H₂S) in the presence of tungsten-zirconia (WO₃/ZrO₂) catalyst to form methanethiol.
Uses 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.
Preparation 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.
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.
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.
Potential Exposure 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
First aid If Dimethyl sulfide 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.
storage 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.
Shipping Dimethyl sulfide requires a shipping label of“FLAMMABLE LIQUID.” It falls in Hazard Class 3 andPacking Group II.
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.]
Incompatibilities Reacts violently with strong ox
Toxics Screening Level The initial threshold screening level (ITSL) for dimethylsulfide is 7 μg/m3 based on an annual averaging time.