13393-75-4

Basic information

• Product Name: 2-Methylthieno[3,2-b]thiophene
• Synonyms: 2-Methylthieno[3,2-b]thiophene
• CAS NO: 13393-75-4
• Molecular Formula: C₇H₆S₂
• Molecular Weight: 154.25
• Mol File: 13393-75-4.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 245.679°C at 760 mmHg
• Flash Point: 73.687°C
• Appearance: /
• Density: 1.299g/cm³
• Vapor Pressure: 0.044mmHg at 25°C
• Refractive Index: 1.696
• CAS DataBase Reference: 2-Methylthieno[3,2-b]thiophene(CAS DataBase Reference)
• NIST Chemistry Reference: 2-Methylthieno[3,2-b]thiophene(13393-75-4)
• EPA Substance Registry System: 2-Methylthieno[3,2-b]thiophene(13393-75-4)

Safety Data

• Hazardous Substances Data: 13393-75-4(Hazardous Substances Data)

Usage

InChI:InChI=1/C7H6S2/c1-5-4-6-2-3-8-7(6)9-5/h2-4H,1H3

Upstream product

• 52-90-4 L-Cysteine 
• 50-81-7 ascorbic acid 

Relevant articles and documents

Aroma compounds generated from thermal reaction of l-ascorbic acid with l-cysteine

The reaction of l-ascorbic acid with l-cysteine in heated aqueous solution (141 ± 1 °C) at five different pH values (5.00, 6.00, 7.00, 8.00, or 9.00) for 2 h, resulted in the formation of a complex mixture of aroma volatiles. The volatile compounds generated were analysed by SPME-GC-MS. The results gave 43 aroma compounds. The reaction between l-ascorbic acid and l-cysteine led mainly to the formation of alicyclic sulphur compounds, thiophenes, thienothiophenes, thiophenones, thiazoles and pyrazines, most of which contain sulphur. Many of these volatiles had meaty flavour. The origin of many of the compounds was explained. The studies showed that thienothiophenes and thienones were formed mainly at acidic pH. In contrast, higher pH values could promote the production of thiophenes, thiazoles and pyrazines.