2,4-BIS(METHYLTHIO)-1,3,2,4-DITHIADIPHOSPHETANE-2,4-DISULFIDE Chemical Properties

Melting point:

165-166℃

Boiling point:

382.5±25.0 °C(Predicted)

Density 

1.69±0.1 g/cm3(Predicted)

Flash point:

105 °F

BRN 

4182442

Safety Information

Hazard Codes 

Xn,N,F

Risk Statements 

22-51/53-10-61-50/53-11

Safety Statements 

61

RIDADR 

UN 1325 4.1/PG 2

WGK Germany 

3

F 

13

HS Code 

2931499090

MSDS

• Language:English Provider:SigmaAldrich

2,4-BIS(METHYLTHIO)-1,3,2,4-DITHIADIPHOSPHETANE-2,4-DISULFIDE Usage And Synthesis

Description

2,4-BIS(METHYLTHIO)-1,3,2,4-DITHIADIPHOSPHETANE-2,4-DISULFIDE (Davy's reagent) is reagent for the conversion of carboxylic acids into dithioesters and carbonyl groups into thiocarbonyl groups.

storage

2,4-BIS(METHYLTHIO)-1,3,2,4-DITHIADIPHOSPHETANE-2,4-DISULFIDE should be stored in the cold with exclusion of moisture. It is very toxic and must be handled under a hood or in glove-boxes due to its intolerable odor and the hazardous  methanethiol which is easily liberated with moisture.

Purification Methods

It crystallises from *C6H6 in yellow plates or from hot trichlorobenzene. The low melting point reported in the literature (112o with gradual softening at 68-102o) has been attributed to the presence of elemental sulfur in the crystals. It has a foul odour and is a suspected carcinogen. [Yousif et al. Tetrahedron 40 2663 1984, Scott et al. J Org Chem 22 789 1957.]

2,4-BIS(METHYLTHIO)-1,3,2,4-DITHIADIPHOSPHETANE-2,4-DISULFIDE(82737-61-9)Related Product Information

• 2,4-BIS(P-TOLYLTHIO)-1,3-DITHIA-2,4-DIPHOSPHETANE-2,4-DISULFIDE
• 2,4-BIS(METHYLTHIO)-1,3,2,4-DITHIADIPHOSPHETANE-2,4-DISULFIDE
• 2,4-BIS(ETHYLTHIO)-1,3,2,4-DITHIADIPHOSPHETANE-2,4-DISULFIDE
• PHOSPHORUS TRISULFIDE