3,4-Ethylenedioxythiophene

3,4-Ethylenedioxythiophene
Names
	Preferred IUPAC name 2,3-Dihydrothieno[3,4-b][1,4]dioxine
Identifiers
CAS Number	126213-50-1;
3D model (JSmol)	Interactive image;
Beilstein Reference	7126466
ChemSpider	3622202;
ECHA InfoCard	100.122.178
EC Number	603-128-0;
PubChem CID	4421864;
UNII	8SEC7Q2K7G ;
CompTox Dashboard (EPA)	DTXSID301047399 DTXSID40888925, DTXSID301047399 ;
	InChI InChI=1S/C6H6O2S/c1-2-8-6-4-9-3-5(6)7-1/h3-4H,1-2H2 Key: GKWLILHTTGWKLQ-UHFFFAOYSA-N;
	SMILES C1COC2=CSC=C2O1;
Properties
Chemical formula	C6H6O2S
Molar mass	142.17 g·mol−1
Appearance	colorless liquid
Density	1.34 g/cm3
Melting point	10.5 °C (50.9 °F; 283.6 K)
Boiling point	225 °C (437 °F; 498 K)
Solubility in water	2.1 g/L
Viscosity	11 mPa·s
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H311, H312, H319, H412
Precautionary statements	P262, P264, P264+P265, P270, P273, P280, P301+P317, P302+P352, P305+P351+P338, P316, P317, P321, P330, P337+P317, P361+P364, P362+P364, P405, P501
Flash point	104 °C (219 °F; 377 K)
Autoignition; temperature	360 °C (680 °F; 633 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

3,4-Ethylenedioxythiophene (EDOT) is an organosulfur compound with the formula C₂H₄O₂C₄H₂S. The molecule consists of thiophene, substituted at the 3 and 4 positions with an ethylene glycolyl unit. It is a colorless viscous liquid.

EDOT is the precursor to the polymer PEDOT, which is found in electrochromic displays, photovoltaics, electroluminescent displays, printed wiring, and sensors.