3,3'-DITHIODIPROPIONIC ACID

PRODUCT IDENTIFICATION
CAS NO.

1119-62-6

3,3'-DITHIODIPROPIONIC ACID
EINECS NO. 214-284-0
FORMULA

(CH 2CH 2COOH)S2
MOL WT. 210.26
H.S. CODE 2930.90
TOXICITY  
SMILES

 
SYNONYMS Bis(2-carboxyethyl) disulfide;
2-Carboxyethyl disulfide;

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

Off-white powder
MELTING POINT 152 - 157 C
BOILING POINT  
SPECIFIC GRAVITY  
SOLUBILITY IN WATER  
AUTOIGNITION  
pH  
VAPOR DENSITY  
NFPA RATINGS Health: 3; Flammability: 1; Reactivity: 0

REFRACTIVE INDEX

  
FLASH POINT

 
STABILITY Stable under ordinary conditions.

GENERAL DESCRIPTION AND APPLICATIONS
Thioether is a compound that has the bond C-S-C, with general formula R-S-R. The R group can be same or different any organic group. Thoughr alkyl and aromatic thioethers are commonly called 'sulfides'. the term sulfide refers to sulfur compounds of its lowest oxidation number of -2. Generally thioethers are clear and volatile organic compounds with and disagreeable odor; obtained from alkyl halides and alkali sulfides. Sulfur compounds causes distinctive scent and are used as a constituent of various flavors & fragrances.

Thioether is the sulfur analog of the ether (R-O-R), which sulfur atom replaces the oxygen. Sulfur and oxygen belong to the same group in the periodic table share similar chemical properties. The functional groups of sulfur and oxygen share similar chemical bonds and properties. Ethers can only be oxidized to peroxides (R-O-O-R). But thioethers (R-S-R) can be oxidized either to disulfides (R-S-S-R) or to sulfoxides (R-S(=O)-R) which can be further oxidized to the corresponding sulfones (R-S(=O)2-R) depending on the structure of the thioether.

Dimethyl Sulfide is the simplest thioether. The compound is a clear, flammable liquid; insoluble in water; boiling point 37C; with a distinctive garlic-like odor. It is used as a flavor component to enhance corn-related flavors. It is used as a presulfiding agent in the refinery and petrochemical production. The catalysts in hydrocracking, hydrodenitrification, hydrodesulfurization and reforming processes are used in oxide forms, which must be converted to the active sulfide form during the start-up to prevent the reduction of the catalysts to their base material by heat. The sulfur sources include alkyl mercaptans (methyl mercaptan, ethyl mercaptan, butyl mercaptan), dimethyl sulfide, dimethyl sulfoxide, dimethyl disulfide, and tert-nolyl polysulfide. They are used to modify the reactivity of catalysts to use in high temperature process furnaces. Dimethyl Sulfide is used to prevent the coke deposits which acts as a thermal insulator in the tube as it accumulates in pyrolysis furnaces. It is also used in steel mill furnaces to control dusting. Dimethyl Sulfide is included as a component of dangerous gases to detect the leaks by smell.

Thioethers have applications in organic synthesis as solvents as well as reagents. Acyclic thioethers with oxidized branches such as alcohol, aldehyde, ester, acid, beta-ketone, phenol demonstrate centres of greater polarity and additional functional sites for the additional uses. Cyclic sulfides containing oxidized carbon atoms would involve extensive S-oxidation. Thioethers are involved in versatile in the synthesis of specific compound classes include agricultural chemical, property-enhancing additives, pharmacological drugs, chemical resistant polymers, detergents, and rubber antioxidants.

3,3'-Dithiodipropionic acid is a white solid with strong odor used as a chemical intermediate for the production of other compounds.
SALES SPECIFICATION

APPEARANCE

Off-white powder
ASSAY

99.0% min

MELTING POINT

 152 - 157 C
TRANSPORTATION
PACKING 50kgs in fiber drum
HAZARD CLASS 8 (Packing Group: III)
UN NO.

3261
OTHER INFORMATION
Hazard Symbols: C, Risk Phrases: 34, Safety Phrases: 28A-37/45