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2,2'-Biquinoline

2,2'-Biquinoline structure

CAS No.: 119-91-5

Chemical Name:: 2,2'-Biquinoline

Synonyms: 2,2-BIQUINOLINE;CUPROIN;CUPROINE;CUPROIN R. G.;2,2'-Quinolyl;2,2'-BiquinoL;A,A -DIQUINOLYL;2,2'-DIQUINOLYL;2,2'-BIQUINOLYL;α,α'-Biquinolyl

CBNumber:: CB0213789

Molecular Formula:: C18H12N2

Molecular Weight:: 256.3

MDL Number:: MFCD00006740

MOL File:: 119-91-5.mol

MSDS File:: SDS

TDS File:: TDS

Last updated:2026-05-27 17:23:33

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2,2'-Biquinoline Properties

Melting point	192-195 °C(lit.)
Boiling point	389.54°C (rough estimate)
Density	0.9734 (rough estimate)
bulk density	290kg/m3
refractive index	1.6300 (estimate)
storage temp.	Keep in dark place,Sealed in dry,Room Temperature
solubility	1.02mg/l
form	Shiny Flakes
pka	2.19±0.61(Predicted)
color	Slightly yellow to light beige
Water Solubility	Sparingly soluble in water (0.001g/L).
BRN	187259
InChI	1S/C18H12N2/c1-3-7-15-13(5-1)9-11-17(19-15)18-12-10-14-6-2-4-8-16(14)20-18/h1-12H
InChIKey	WPTCSQBWLUUYDV-UHFFFAOYSA-N
SMILES	c1ccc2nc(ccc2c1)-c3ccc4ccccc4n3
CAS DataBase Reference	119-91-5(CAS DataBase Reference)
FDA UNII	6RO6GA6RP3
NIST Chemistry Reference	2,2'-Biquinoline(119-91-5)
EPA Substance Registry System	2,2'-Biquinoline (119-91-5)
UNSPSC Code	41116105
NACRES	NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS07

Signal word

Warning

Hazard statements

H335-H315-H319

Precautionary statements

P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P261-P280a-P304+P340-P305+P351+P338-P405-P501a

PPE

dust mask type N95 (US), Eyeshields, Gloves

Hazard Codes

Risk Statements

36/37/38

Safety Statements

26-36-37/39

WGK Germany

TSCA

TSCA listed

HS Code

29334990

Storage Class

11 - Combustible Solids

NFPA 704

	1
2		0

2,2'-Biquinoline price More Price(67)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	35020	2,2′-Biquinoline for spectrophotometric det. of Cu, ≥99.0%	119-91-5	1g	$48.3	2022-05-15	Buy
Sigma-Aldrich	1.02955	2,2′-Biquinoline GR for analysis	119-91-5	5G	$1040	2022-05-15	Buy
TCI Chemical	B0470	2,2'-Biquinoline >98.0%(HPLC)(T)	119-91-5	1g	$45	2026-04-30	Buy
TCI Chemical	B0470	2,2'-Biquinoline >98.0%(HPLC)(T)	119-91-5	5g	$147	2026-04-30	Buy
Usbiological	261945	2,2'-Biquinoline Asreported	119-91-5	10g	$337	2026-06-03	Buy

Product number	Packaging	Price	Buy
35020	1g	$48.3	Buy
1.02955	5G	$1040	Buy
B0470	1g	$45	Buy
B0470	5g	$147	Buy
261945	10g	$337	Buy

2,2'-Biquinoline Chemical Properties, Uses, Production

Preparation

In a 50 mL round-bottom flask, H2O (5.0 g), PEG-400 (1.0 g), and quinoline (1.0 g) were added sequentially. After stirring until homogeneous, W's Pd/C catalyst (0.1 g) was added and the reaction was carried out at 80°C for 20 h. The reaction solution was cooled and filtered. The Pd/C filter cake was washed with water and could be recycled and reused. The filtrate was extracted with ethyl acetate, the solvent was evaporated, concentrated, and crystals were precipitated to obtain the crude product. Recrystallization yielded 0.12 g of white 2,2'-biquinoline crystals, with a yield of 11.9% and a melting point of 196-197°C.

Chemical Properties

SLIGHTLY YELLOW TO LIGHT BEIGE SHINY FLAKES

Uses

2,2'-Biquinoline is used as a reagent for spectrophotometric determination of Cu and as an indicator for titration of organolithium reagents, giving yellow-green charge-transfer complexes.

Application

2,2'-Biquinoline, also known as cuprous reagent, reacts with monovalent cupric ion to give a purple color. It is a highly selective reagent for the determination of cuprous. It can be utilized as a ligand in the synthesis of heteroleptic Cu(I) complexes for light-emitting diodes(LED) and cationic iridium(III) complexes as phosphorescent dyes for live-cell imaging.

Synthesis Reference(s)

Tetrahedron Letters, 15, p. 2373, 1974 DOI: 10.1016/S0040-4039(01)92259-2

General Description

2,2′-Biquinoline is a white crystalline solid and it melts at 176°C. It is insoluble in water, but is soluble in ethyl, amyl and isoamyl alcohol, isoamyl acetate, dimethylformamide, acetic acid, acetonitrile and carbon tetrachloride.

Purification Methods

Decolourise 2,2'-biquinolyl in CHCl3 solution (charcoal), then crystallise it to constant melting point from EtOH or pet ether [Cumper et al. J Chem Soc 1188 1962]. [Beilstein 23/10 V 8.]

2,2'-Biquinoline synthesis

Synthesis of 2,2'-Biquinoline from 2-Chloroquinoline

2,2'-Biquinoline Preparation Products And Raw materials

Raw materials

2,2'-Biquinoline, 1,1'-dioxide 2,2'-Biquinoline, 1-oxide 2,2'-Biquinoline, 1,1',2,2',3,3',4,4'-octahydro- 2-Bromoquinoline 2-Chloroquinoline

2-(tributylstannyl)quinoline Quinoline-N-oxide Quinoline

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Preparation Products

2-Butylquinoline 2-(2-Naphthyl)quinoline

2,2'-Biquinoline Suppliers

Global Suppliers ( 313)

Supplier	Tel	Email	Country	ProdList	Advantage
Shanghai Uchem Inc.	15618758386 15618758386	sales3@myuchem.com	China	1994	55
J & K SCIENTIFIC LTD.	18210857532 18210857532	jkinfo@jkchemical.com	China	96815	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	4006356688 18621169109	market03@meryer.com	China	40202	62
INTATRADE GmbH	+49 3493/605464	sales@intatrade.de	Germany	3563	66
3B Pharmachem (Wuhan) International Co.,Ltd.	18930552037	3bsc@sina.com	China	15813	69
Alfa Aesar	400-6106006	saleschina@alfa-asia.com	China	30103	84
TCI (Shanghai) Development Co., Ltd.	021-67121386	Sales-CN@TCIchemicals.com	China	24512	81
Energy Chemical	400-0056266	sales8178@energy-chemical.com	China	44850	61
Beijing Ouhe Technology Co., Ltd	13552068683 13522913783	2355560935@qq.com	China	11777	60
Shanghai Hanhong Scientific Co.,Ltd.	021-54306202 13764082696	info@hanhongsci.com	China	42917	64

Supplier	Advantage
Shanghai Uchem Inc.	55
J & K SCIENTIFIC LTD.	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	62
INTATRADE GmbH	66
3B Pharmachem (Wuhan) International Co.,Ltd.	69
Alfa Aesar	84
TCI (Shanghai) Development Co., Ltd.	81
Energy Chemical	61
Beijing Ouhe Technology Co., Ltd	60
Shanghai Hanhong Scientific Co.,Ltd.	64

View Latest Price from 2,2'-Biquinoline manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2026-09-17	2,2’-biquinoline 119-91-5	$23.00-317.00	1g	0.98	25kg	Shanghai UCHEM Inc.
2026-08-20	2,2'-Biquinoline 119-91-5	$1.10	1g	99.00%	100 Tons	Dideu Industries Group Limited
2026-03-20	2,2'-Biquinoline 119-91-5	$10.00	1KG	99%	10 mt	Hebei Chuanghai Biotechnology Co., Ltd

2,2’-biquinoline
119-91-5
$23.00-317.00
0.98
Shanghai UCHEM Inc.

2,2'-Biquinoline
119-91-5
$1.10
99.00%
Dideu Industries Group Limited

2,2'-Biquinoline
119-91-5
$10.00
99%
Hebei Chuanghai Biotechnology Co., Ltd

2,2'-Biquinoline Spectrum

2,2'-Biquinoline(119-91-5)MS 2,2'-Biquinoline(119-91-5)¹HNMR 2,2'-Biquinoline(119-91-5)¹³CNMR 2,2'-Biquinoline(119-91-5)IR1 2,2'-Biquinoline(119-91-5)IR2 2,2'-Biquinoline(119-91-5)IR3 2,2'-Biquinoline(119-91-5)Raman

119-91-5 (2,2'-Biquinoline) Related Search:

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Cuproine 2,2'-Diquinolyl 2,2'-BIQUINOLINE GR FOR ANALYSIS CUPROIN R. G. 2-2-BiquinolineGr 2,2'-Diquinolyl, 98+% 2,2’-BIQUINOLINE GR (2,2' Diquinolyl) 2,3''-BIQUINOLINE GR 2,2'-Biquinoline, 98+% A,A -DIQUINOLYL 2,2-DIQUINOLYL extrapure AR 2,2μ-Diquinolyl, Cuproin 2-Quinolin-2-ylquinoline 2,2'-Biquinoline 98% α,α'-Biquinolyl Cuproine 2,2'-Diquinolyl CUPROIN CUPROINE 2,2'-DIQUINOLYL 2,2'-BIQUINOLYL ALPHA,ALPHA'-DIQUINOLYL 2,2'-Quinolyl TIMTEC-BB SBB008865 2,2-DIQUINOLEINE Cuproin~2,2-Diquinolyl α,α'-Biquinolyl 2,2'-Biquinoline > 2,2'-BiquinoL 2,2'-Biquinoline ISO 9001：2015 REACH 2,2'-Biquinoline, GR 99%+ 119-91-5 2,2'-Biquinoline 2,2-Biquinoline (2,2-Diquinolyl, Cuproine) extrapure AR, 99% 2,2'-BIQUINOLINE AR 2,2'-Biquinoline (6CI, 7CI, 8CI, 9CI, ACI) 2,2'-Biquinoline 2,2''-Biquinoline 2,2'-Biquinoline 99% AR 2,2′-Biquinoline, CAS 119-91-5 2,2-BIQUINOLINE 119-91-5 C18H12N2 Heterocyclic Building Blocks IR/UV/ VIS Spectroscopy Reagents Quinolines Quinolinecarboxylic Acids, etc. Building Blocks Analytical Reagents Analytical Chromatography Product Catalog Quinolinecarboxylic Acids, etc. Quinolines