Bis(methylthio)methane

Bis(methylthio)methane Basic information

Product Name:	Bis(methylthio)methane
Synonyms:	FEMA 3878;FORMALDEHYDE DIMETHYL MERCAPTAL;DIMETHYLTHIOMETHANE;BIS(METHYLMERCAPTO)METHANE;BIS(METHYLTHIO)METHANE;2,4-DITHIAPENTANE;Bis(methyL;thio)methane
CAS:	1618-26-4
MF:	C3H8S2
MW:	108.23
EINECS:	216-577-9
Product Categories:	Building Blocks;Chemical Synthesis;sulfide Flavor;Organic Building Blocks;Sulfides/Disulfides;Sulfur Compounds;Industrial/Fine Chemicals
Mol File:	1618-26-4.mol

Bis(methylthio)methane Chemical Properties

Melting point	148 °C
Boiling point	147 °C(lit.)
density	1.059 g/mL at 25 °C(lit.)
vapor pressure	4.679hPa at 20℃
FEMA	3878 \| BIS-(METHYLTHIO)METHANE
refractive index	n20/D 1.53(lit.)
Fp	111 °F
storage temp.	Inert atmosphere,2-8°C
solubility	IMMISCIBLE
form	neat
Specific Gravity	1.059
color	APHA: ≤100
Odor	at 0.10 % in propylene glycol. garlic sulfurous green spicy mushroom
Odor Type	sulfurous
Water Solubility	IMMISCIBLE
Merck	14,1256
JECFA Number	533
BRN	1731143
LogP	2.31 at 20℃
CAS DataBase Reference	1618-26-4(CAS DataBase Reference)
NIST Chemistry Reference	2,4-Dithiapentane(1618-26-4)
EPA Substance Registry System	Methane, bis(methylthio)- (1618-26-4)

Safety Information

MSDS Information

Bis(methylthio)methane Usage And Synthesis

Chemical Properties	CLEAR COLOURLESS TO PALE YELLOW LIQUID
Chemical Properties	bis-(Methylthio)methane has a mustard-like odor.
Occurrence	Reported found in Camembert and Gruyere cheeses, milk, fish oil, cooked and canned beef, shitake mushroom, truffle, prawn and lobster.
Uses	Bis(methylthio)methane is used in method for reducing odor in room in remodeling work by removing causative substances.
Definition	ChEBI: Bis(methylthio)methane is a dithioacetal.
General Description	The liquid structure of bis(methylthio)methane at room temperature was studied by the bonding and non-bonding interatomic potential functions (FMP-RMC) simulation.
Flammability and Explosibility	Notclassified
Purification Methods	Work in an efficient fume cupboard as the substance may contain traces (or more) of methylmercaptan which has a very bad odour. Dissolve the mercaptal in Et2O, shake it with aqueous alkalis then dry it over anhydrous K2CO3, filter and distil it over K2CO3 under a stream of N2. If the odour is very strong, then allow all gas efluents to bubble through 5% aqueous NaOH solution which is then treated with dilute KMnO4 in order to oxidise MeSH to odourless products. UV: max 238 nm (log 2.73) [Fehnel & Carmack J Am Chem Soc 71 90 1949, Fehér & Vogelbruch Chem Ber 91 996 1958, B.hme & Marz Chem Ber 74 1672 1941]. Oxidation with aqueous KMnO4 yields bis-(methylsulfonyl)methane which has m 142-143o [Fiecchi et al. Tetrahedron Lett 1681 1967]. [Beilstein 1 IV 3088.]

Bis(methylthio)methane Preparation Products And Raw materials

Raw materials	1H-Isoindole-1,3(2H)-dione, 2-[(methylthio)methyl]--->Dibutoxymethane-->MMTS-->Dichloromethane-->Dimethyl sulfoxide-->METHYL MERCAPTAN
Preparation Products	Methyl 2-(methylamino)benzoate-->Dichloromaleic anhydride-->S-Methyl methanethiolsulfonate-->Trimethylsulfonium bromide-->CHLOROMETHYL METHYL SULFIDE

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