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Basic Information
CAS No.: 624-92-0
Name: Dimethyl disulfide
Molecular Structure:
Molecular Structure of 624-92-0 (Dimethyl disulfide)
Formula: C2H6S2
Molecular Weight: 94.19
Synonyms: FEMA No. 3536;Disulfide,dimethyl;Methyl disulfide (8CI);Disulfide, dimethyl;Methyldisulfide;(Methyldithio)methane;Methyldithiomethane;Dimethyl disulphide;2,3-Dithiabutane;Sulfa-Hitech;
EINECS: 210-871-0
Density: 1.052 g/cm3
Melting Point: -85 °C
Boiling Point: 109.7 °C at 760 mmHg
Flash Point: 24.4 °C
Solubility: <0.1 g/100 mL at 20 °C in water
Appearance: colourless to yellow liquid
Hazard Symbols: HarmfulXn,FlammableF, VeryT+, DangerousN
Risk Codes: 11-20/22-36-51/53-36/37/38-26-22
Safety: 26-61-45-38-36/37/39-28A-16-60
Transport Information: UN 2381 3/PG 2
PSA: 50.60000
LogP: 1.62740
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The IUPAC name of Dimethyl disulfide is (methyldisulfanyl)methane. With the CAS registry number 624-92-0, it is also named as Methyl disulfide. The product's category is Sulfide Flavor. Besides, it is colourless to yellow liquid with a very unpleasant smell, which should be stored in sealed containers in a cool, dry place away from oxidizing agents and reducing agents. It is stable, but incompatible with strong bases, strong oxidizing agents, strong reducing agents. In addition, its molecular formula is C2H6S2 and molecular weight is 94.19.

The other characteristics of this product can be summarized as: (1)EINECS: 210-871-0; (2)ACD/LogP: 1.77; (3)# of Rule of 5 Violations: 0; (4)ACD/LogD (pH 5.5): 1.77; (5)ACD/LogD (pH 7.4): 1.77; (6)ACD/BCF (pH 5.5): 13.04; (7)ACD/BCF (pH 7.4): 13.04; (8)ACD/KOC (pH 5.5): 218.72; (9)ACD/KOC (pH 7.4): 218.72; (10)#H bond acceptors: 0; (11)#H bond donors: 0; (12)#Freely Rotating Bonds: 1; (13)Index of Refraction: 1.522; (14)Molar Refractivity: 27.3 cm3; (15)Molar Volume: 89.4 cm3; (16)Surface Tension: 32.1 dyne/cm; (17)Density: 1.052 g/cm3; (18)Flash Point: 24.4 °C; (19)Melting Point: -85 °C; (20)Water Solubility: <0.1 g/100 mL at 20 °C; (21)Enthalpy of Vaporization: 33.78 kJ/mol; (22)Boiling Point: 109.7 °C at 760 mmHg; (23)Vapour Pressure: 28.7 mmHg at 25 °C.

Preparation of Dimethyl disulfide: this chemical can be prepared by the reaction of Dimethyl sulfate with Disodium disulfide.

Uses of Dimethyl disulfide: this chemical is used as an intermediate of solvent and pesticide. It is also used as additive of fuel and lubricant. Additionally, it can be used as cooking inhibitor in ethylene furnace and refining equipment. The product can be used in the preparation of food flavors. Similarly, it can react with Diethyldisulfane to get Ethyl-methyl-disulfane.

This reaction needs NO, air and CD3CN at temperature of 20 °C for 1 hour. The yield is 49 %.

When you are using this chemical, please be cautious about it as the following: it is highly Flammable. Please keep away from sources of ignition. It is also harmful and very toxic by inhalation and if swallowed. And it is irritating to eyes, respiratory system and skin. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Moreover, you should wear suitable protective clothing, gloves and eye/face protection. After contact with skin, wash immediately with plenty of soap-suds. And in case of insufficient ventilation, wear suitable respiratory equipment. In case of accident or if you feel unwell, seek medical advice immediately (show label where possible). Additionally, it is toxic to aquatic organisms that may cause long-term adverse effects in the aquatic environment. Please avoid release to the environment. Refer to special instructions safety data sheet. This material and its container must be disposed of as hazardous waste.

People can use the following data to convert to the molecule structure.
(2)InChI: InChI=1/C2H6S2/c1-3-4-2/h1-2H3

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mammal (species unspecified) LD50 unreported 138mg/kg (138mg/kg)   Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 16(6), Pg. 46, 1972.
mouse LC50 inhalation 12300ug/m3/2H (12.3mg/m3)   Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 16(6), Pg. 46, 1972.
rat LC50 inhalation 15850ug/m3/2H (15.85mg/m3)   Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 16(6), Pg. 46, 1972.