![Thieno[3,2-<i>b</i>]thiophene-2-carboxylic Acid](https://img.chemicalbook.com/CAS/GIF/1723-27-9.gif)
PRODUCT Properties
| Melting point: | 225-227 |
| Boiling point: | 386.7±22.0 °C(Predicted) |
| Density | 1.601±0.06 g/cm3(Predicted) |
| storage temp. | 2-8°C(protect from light) |
| form | powder to crystal |
| pka | 3.40±0.30(Predicted) |
| color | White to Yellow to Green |
Description and Uses
Thieno[3,2-b]thiophene-2-carboxylic Acid has been used as a reactant for versatile α,ω-disubstituted tetratienoacene semiconductors for high performance organic thin-film transistors.
Safety
| Symbol(GHS) |  GHS07 |
| Signal word | Warning |
| Hazard statements | H319-H315 |
| Precautionary statements | P264-P280-P305+P351+P338-P337+P313P-P264-P280-P302+P352-P321-P332+P313-P362 |
| Hazard Codes | Xi |
| Risk Statements | 36/37/38-41 |
| Safety Statements | 26-37/39-39 |
| HazardClass | IRRITANT |
| HS Code | 29349990 |
![Methyl Thieno[3,2-<i>b</i>]thiophene-2-carboxylate](https://img.chemicalbook.com/CAS/GIF/98800-10-3.gif)