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5-Ethynyl-2,2-bithiophene is an organic compound characterized by a bithiophene core, which consists of two thiophene rings fused together. The molecule features an ethynyl group (a triple-bonded carbon chain) attached to the fifth carbon atom of the bithiophene structure. 5-Ethynyl-2,2-bithiophene is of interest in the field of organic electronics, particularly in the development of materials for organic light-emitting diodes (OLEDs) and organic solar cells, due to its potential to enhance charge transport and light-emitting properties. The ethynyl group's presence can influence the electronic properties of the molecule, making it a valuable building block for designing new materials with tailored characteristics for specific applications.

4743-21-9

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Basic information
1. Product Name: 5-Ethynyl-2,2-bithiophene
2. Synonyms: 5-ethynyl-2,2'-bithienyl;2,2'-Bithiophene,5-ethynyl;5-ethyinyl-2,2'-bithiophene;5-Ethynyl-2,2'-bithiophene;5-Aethinyl-<2,2'>bithienyl;
3. CAS NO:4743-21-9
4. Molecular Formula: C₁₀H₆S₂
5. Molecular Weight: 190.29
6. EINECS: N/A
7. Product Categories: N/A
8. Mol File: 4743-21-9.mol
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: 305.7oC at 760 mmHg
3. Flash Point: 102.1oC
4. Appearance: N/A
5. Density: 1.28g/cm3
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: 5-Ethynyl-2,2-bithiophene(CAS DataBase Reference)
10. NIST Chemistry Reference: 5-Ethynyl-2,2-bithiophene(4743-21-9)
11. EPA Substance Registry System: 5-Ethynyl-2,2-bithiophene(4743-21-9)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: N/A
4. WGK Germany:
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 4743-21-9(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 4743-21-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,7,4 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 4743-21:
(6*4)+(5*7)+(4*4)+(3*3)+(2*2)+(1*1)=89
89 % 10 = 9
So 4743-21-9 is a valid CAS Registry Number.

4743-21-9SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017

1.Identification

1.1 GHS Product identifier

Product name	2-ethynyl-5-thiophen-2-ylthiophene

1.2 Other means of identification

Product number	-
Other names	5-Aethinyl-<2,2'>bithienyl

1.3 Recommended use of the chemical and restrictions on use

Identified uses	For industry use only.
Uses advised against	no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number	-
Service hours	Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:4743-21-9 SDS

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