THIOPHENE-2-CARBOXYLIC ACID

PRODUCT IDENTIFICATION

CAS NO. 527-72-0

THIOPHENE-2-CARBOXYLIC ACID

EINECS NO. 208-423-4
FORMULA C5H4O2S
MOL WT. 128.15

H.S. CODE

2934.99

TOXICITY

 

SYNONYMS 2-Thenoic acid; 2-Thiophenecarboxylic acid;
SMILES

 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE white to off-white powder
MELTING POINT 127 - 130 C
BOILING POINT 260 C
SPECIFIC GRAVITY  
SOLUBILITY IN WATER  
pH  
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

Health: 1; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX

 
FLASH POINT  
STABILITY

Stable under ordinary conditions

GENERAL DESCRIPTION AND APPLICATIONS

Thiophene, also known as thiofuran, is a cyclic compound containing four carbon atoms and one sulfur atom in the ring. Thiophene is an analog to furan and pyrrole where the sulfur atom is replaced by O and NH respectively. Thiophene is a toxic, flammable, and colorless liquid; insoluble in water (soluble in most organic solvents including alcohol and ether); melting at -38 C, boiling at 84 C. Thiophene is the simplest aromatic compound containing sulfur atom and it shares some similar chemical properties with benzene. The lone electron pairs on sulfur in the delocalized pi electron system does not exhibits the properties of thioethers but aromaticity. The sulfur atom is unreactive but the adjacent carbons are susceptible to attack by electrophiles. It is reactive toward sulfonation. In commercial thiophene can be prepared by the reaction of butane and sulfur. Thiophenes are also prepared by the reaction of diketones with Lawesson's reagent. Thiophene and its derivatives exist in petroleum or coal. Thiophene derivatives are also found in natural plant pigments. Biotin, a water-soluble B-complex vitamin, is a reduced thiophene derivative. Thiophene moiety is found in ccphalothin antiboitics. Thiophene is used as a solvent and chemical intermediate. Its derivatives are used in manufacturing dyes, aroma compounds and pharmaceuticals. They are used as monomers to make condensation copolymers. Organic conductive polymers are responsible for the important materials science for the application of polymer electro luminescence.
SALES SPECIFICATION

APPEARANCE

white to off-white powder

ASSAY

98.0% min

WATER

0.5% max

TRANSPORTATION
PACKING 25kgs in fiber drum
HAZARD CLASS  
UN NO.  
OTHER INFORMATION
Hazard Symbols: XN, Risk Phrases: 36/37/38, Safety Phrases: 24/25

PRICE INFORMATION

Click to open the table

 

Click to close the table