- 4,4'-Bipyridine
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- $65.00
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2026-09-11
- CAS:553-26-4
- Min. Order: 1g
- Purity: 0.98
- Supply Ability: 25kg
- 4,4'-Dipyridine
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- $130.00
-
2026-09-09
- CAS:553-26-4
- Min. Order: 1kg
- Purity: 99%min
- Supply Ability: 500kgs
- 4,4'-Bipyridine
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- $8.90
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2026-03-20
- CAS:553-26-4
- Min. Order: 1KG
- Purity: 99%
- Supply Ability: 10 mt
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| Product Name: | 4,4'-Bipyridine | | Synonyms: | 'LGC' (1608);GAMMA,GAMMA-DIPYRIDYL;4, 4'-DIPYRIDINE;4,4'-BIPYRIDYL HYDRATE;4,4,4'-DIPYRIDYL;4-PYRIDIN-4-YLPYRIDINE;4,4’-Bipyridine,dihydrate;Bipyridine, 4,4'- | | CAS: | 553-26-4 | | MF: | C10H8N2 | | MW: | 156.18 | | EINECS: | 209-036-3 | | Product Categories: | Viologens (Photochromic, Related Compounds);Functional Materials;Photochromic Compounds;Pyridines;Pyridines derivates;PYRIDINE;bc0001;553-26-4 | | Mol File: | 553-26-4.mol |  |
| | 4,4'-Bipyridine Chemical Properties |
| Melting point | 109-112 °C(lit.) | | Boiling point | 305 °C(lit.) | | density | 1.2814 (rough estimate) | | refractive index | 1.6057 (estimate) | | Fp | 304-305°C | | storage temp. | Store below +30°C. | | solubility | 4.5g/l | | form | Powder | | pka | pK1:3.17(+2);pK2:4.82(+1) (25°C) | | color | Off-white to beige | | Water Solubility | slightly soluble | | Sensitive | Hygroscopic | | λmax | 300nm(CH3CN)(lit.) | | Merck | 14,3348 | | BRN | 113176 | | Henry's Law Constant | 3.9×103 mol/(m3Pa) at 25℃, Duchowicz et al. (2020) | | Stability: | Stable. Incompatible with strong oxidizing agents, strong acids. | | InChI | 1S/C10H8N2/c1-5-11-6-2-9(1)10-3-7-12-8-4-10/h1-8H | | InChIKey | MWVTWFVJZLCBMC-UHFFFAOYSA-N | | SMILES | c1cc(ccn1)-c2ccncc2 | | CAS DataBase Reference | 553-26-4(CAS DataBase Reference) | | NIST Chemistry Reference | 4,4'-Bipyridine(553-26-4) | | EPA Substance Registry System | 4,4'-Bipyridine (553-26-4) |
| Hazard Codes | T,Xi | | Risk Statements | 25-36/37/38-20/21-23/24/25 | | Safety Statements | 26-36/37/39-45 | | RIDADR | UN 2811 6.1/PG 3 | | WGK Germany | 3 | | RTECS | DW1760000 | | Hazard Note | Irritant | | TSCA | TSCA listed | | HazardClass | 6.1 | | PackingGroup | III | | HS Code | 29333999 | | Storage Class | 6.1C - Combustible acute toxic Cat.3
toxic compounds or compounds which causing chronic effects | | Hazard Classifications | Acute Tox. 3 Oral | | Toxicity | LD50 orally in Rabbit: 172 mg/kg |
| | 4,4'-Bipyridine Usage And Synthesis |
| Synthesis | In a dry reaction flask, 4-bromopyridine (1.0 mmol), palladium acetate (5.61 mg, 0.025 mmol), indium (57.4 mg, 0.5 mmol), and lithium chloride (63.5 mg, 1.5 mmol) were dissolved in dry N,N-dimethylformamide (2 mL), and the mixture was reacted at 100 °C for 2.5 h under nitrogen protection. After the reaction was complete, the reaction mixture was quenched with saturated sodium bicarbonate aqueous solution, and the aqueous layer was extracted three times with ethyl acetate (3 × 20 mL). The organic layer was separated and washed with 20 mL of water and 20 mL of brine, respectively. The organic phase was dried with anhydrous magnesium sulfate, filtered to remove the drying agent, and the resulting filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate-n-hexane = 1:2) to obtain the target molecule 4,4'-bipyridine.
 Figure 4,4'-bipyridine | | Chemical Properties | off-white to tan powder | | Uses | 4,4'-Bipyridine is used in transition-metal complex catalyst chemistry for uniform polymerization, in luminescence chemistry and in spectrophotometric analysis. It plays an important role as a photosensitizer and luminescent material. It is also used as a precursor to paraquat viz. N,N'-dimethyl-4,4'-bipyridinium. | | Definition | ChEBI: A bipyridine in which the two pyridine moieties are linked by a bond between positions C-4 and C-4'. | | Synthesis Reference(s) | Tetrahedron Letters, 26, p. 1655, 1985 DOI: 10.1016/S0040-4039(00)98576-9 | | General Description | 4,4′-Dipyridyl (BPY) is an organic linker mainly used in the preparation of coordination polymers. It is a pyridine derivative in which pyridyl groups can rotate along the carbon-carbon structure. It can be used as a catalyst for photoelectrochemical reduction. | | Safety Profile | Poison by ingestion. When heatedto decomposition it emits toxic vapors of NOx. | | Purification Methods | It crystallises from water, *benzene/pet ether, ethyl acetate and sublimes in vacuo at 70o. Also purify it by dissolving in 0.1M H2SO4 and twice precipitating by addition of 1M NaOH to pH 8. Then recrystallise it from EtOH. For the dihydrochloride see Viologen below. [Collman et al. J Am Chem Soc 109 4606 1987, Beilstein 23 H 800, 23 III/IV 1371, 23/8 V 28.] |
| | 4,4'-Bipyridine Preparation Products And Raw materials |
| Raw materials | Isoalantolactone-->4,4'-Bipyridine 1,1'-dioxide-->sodium pyridine-4-sulfinate-->4-chloropyridine-->4-Chloropyridinium chloride-->1,4-Benzenediacetic acid, 2-nitro--->Benzoylcholine Chloride-->4-Methyl-2-nitrobenzaldehyde | | Preparation Products | 1-Methyl-[4,4']bipiperidinyl-->Paraquat dichloride-->2,2'-Dichloro-[4,4']-bipyridine-->[4,4''-Bipyridine]-2,2''-diamine-->1,1''-[1,2-Phenylenebis(methylene)]bis-4,4'-bipyridinium bishexafluorophosphate-->1,1'-Bis[3-(trimethylammonio)propyl]-4,4'-bipyridinium Tetrachloride Dihydrate |
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