Thieno(2,3-b)thiophene

Names

[ CAS No. ]:
250-84-0

[ Name ]:
Thieno(2,3-b)thiophene

[Synonym ]:
thieno<2,3-b>thiophene
1,6-Thiophthene
Thieno(2,3-b)thiophene
Thieno[2,3-b]thiophene
1,6-Dithiapentalene
thieno[2,3-b]thiophen
Polythieno[2,3-b]thiophene
Thiophthene

Chemical & Physical Properties

[ Density]:
1.4±0.1 g/cm3

[ Boiling Point ]:
225.9±13.0 °C at 760 mmHg

[ Melting Point ]:
7 °C

[ Molecular Formula ]:
C₆H₄S₂

[ Molecular Weight ]:
140.226

[ Flash Point ]:
64.3±6.0 °C

[ Exact Mass ]:
139.975433

[ PSA ]:
56.48000

[ LogP ]:
5.31

[ Vapour Pressure ]:
0.1±0.4 mmHg at 25°C

[ Index of Refraction ]:
1.729

MSDS

Click to get detail MSDS

Safety Information

[ Symbol ]:

GHS07

[ Signal Word ]:
Warning

[ Hazard Statements ]:
H302-H315-H319-H335

[ Precautionary Statements ]:
P261-P305 + P351 + P338

[ Personal Protective Equipment ]:
Eyeshields;Faceshields;full-face respirator (US);Gloves;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter

[ Safety Phrases ]:
S22-S24/25

[ RIDADR ]:
UN 3334

[ HS Code ]:
2934999090

Synthetic Route

Click to get detail synthetic route

Customs

[ HS Code ]: 2934999090

[ Summary ]:
2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%