Bis(methylthio)methane Property

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.)

Flash point:

111 °F

storage temp. 

Inert atmosphere,2-8°C

solubility 

IMMISCIBLE

color 

APHA: ≤100

Specific Gravity

1.059

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

Hazard Codes 

Xi

Risk Statements 

10-36/37/38

Safety Statements 

16-26-36/37/39

RIDADR 

UN 1993 3/PG 3

WGK Germany 

3

F 

13

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

HS Code 

29309070

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H226Flammable liquid and vapour

H315Causes skin irritation

H319Causes serious eye irritation

H412Harmful to aquatic life with long lasting effects

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P233Keep container tightly closed.

P240Ground/bond container and receiving equipment.

P273Avoid release to the environment.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Bis(methylthio)methane Chemical Properties,Usage,Production

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

Not classified

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.]