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2,2′-Biquinoline: Technical Specifications and Applications Guide
Table of Contents
1. Basic Information & Specifications
| Parameter | Specification |
|---|---|
| CAS Number | 119-91-5 |
| Molecular Formula | C18H12N2 |
| Molecular Weight | 256.30 g/mol |
| EINECS Number | 204-357-5 |
| Appearance | White crystalline solid (turns pale yellow upon air exposure) |
2. Physicochemical Properties
- Solubility: Soluble in ethanol, ether, acetone, benzene, chloroform; insoluble in water
- Melting Point: 280°C (for derivative 2,2′-bi-4-lepidine, CAS 7654-51-5)
- Boiling Point: 466.6°C at 760 mmHg (derivative)
- Density: 1.2 g/cm³ (derivative)
3. Industrial Applications
Primary Uses:
- Copper quantification reagent (Cuprioin method)
- Coordination chemistry research
- Precursor for bicinchoninic acid (BCA) protein assay reagents
Derivative Applications:
| Derivative | CAS | Application |
|---|---|---|
| 2,2′-Biquinoline-4,4′-dicarboxylic acid | 1245-13-2 | BCA protein assay formulation |
| Disodium 2,2′-biquinoline-4,4′-dicarboxylate | 979-88-4 | Commercial diagnostic kits |
4. Synthesis Methods
- From 2-Chloroquinoline: Ullmann-type coupling achieves >99% yield
- From Quinoline N-Oxide: Reductive coupling (68% yield)
5. Safety Handling
| Hazard Codes | Preventive Measures |
|---|---|
| R36/37/38 (Eye/Respiratory/Skin irritant) |
|
6. Global Trade Classification
| Region | HS Code | Tariff |
|---|---|---|
| China | 2933499090 | 6.5% MFN |
| EU | 29334990 | General 6.5% |
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