270970
Pyridine
anhydrous, 99.8%
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About This Item
Empirical Formula (Hill Notation):
C5H5N
CAS Number:
Molecular Weight:
79.10
UNSPSC Code:
12352005
NACRES:
NA.21
PubChem Substance ID:
EC Number:
203-809-9
Beilstein/REAXYS Number:
103233
MDL number:
Assay:
99.8%
Grade:
anhydrous
Bp:
115 °C (lit.)
Vapor pressure:
10 mmHg ( 13.2 °C), 20 mmHg ( 25 °C)
grade
anhydrous
Quality Level
vapor density
2.72 (vs air)
vapor pressure
10 mmHg ( 13.2 °C), 20 mmHg ( 25 °C)
assay
99.8%
form
liquid
autoignition temp.
899 °F
expl. lim.
12.4 %
impurities
<0.003% water, <0.005% water (100 mL pkg)
evapn. residue
<0.0005%
color
colorless
refractive index
n20/D 1.509 (lit.)
pH
~8.81 (20 °C)
bp
115 °C (lit.)
mp
−42 °C (lit.)
density
0.978 g/mL at 25 °C (lit.)
SMILES string
C1=CN=CC=C1
InChI
1S/C5H5N/c1-2-4-6-5-3-1/h1-5H
InChI key
JUJWROOIHBZHMG-UHFFFAOYSA-N
General description
Pyridine is a basic N-heterocyclic compound. It acts as nitrogen donor ligand and forms many metal-pyridine complexes. Its complexes having tetrahedral and octahedral geometries can be differentiated by infra-red spectral investigations.
Application
Pyridine may be used as a base for the conversion of:
It may also be used to catalyze the borylation reaction of haloarenes to form arylboronates without using transition metal catalysts.
- Alkyltrichlorosilanes to trimethoxyalkylsilanes, which are used as precursors for preparing alkylsilicates.
- 1-Indanone to 1-indanone oxime, which can undergo reductive ring-expansion to form tetrahydroquinoline.
It may also be used to catalyze the borylation reaction of haloarenes to form arylboronates without using transition metal catalysts.
Pyridine (py) may be used in the preparation of vanadium oxide nanoparticles and iron benzenedicarboxylates, Fe(OH)(BDC)(py)0.85 (BDC = 1,4-benzenedicarboxylate, py = pyridine). It may be employed as catalyst in Knoevenagel condensation reaction.
Packaging
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signalword
Danger
Hazard Classifications
Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Eye Irrit. 2 - Flam. Liq. 2 - Skin Irrit. 2
Storage Class
3 - Flammable liquids
flash_point_f
68.0 °F - closed cup
flash_point_c
20 °C - closed cup
ppe
Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
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Preparation of Diisopropylammonium Bis(catecholato)cyclohexylsilicate
Kingson L, et al
Organic Syntheses, 94, 16-16 (2017)
DIBALH-Mediated Reductive Ring-Expansion Reaction of Cyclic Ketoxime
Taku I, et al
Organic Syntheses, 93, 1-1 (2016)
Pyridine-catalyzed radical borylation of aryl halides
Zhang L & Jiao L
Journal of the American Chemical Society, 139(2), 607-610 (2017)