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Merck
CN

P3776

Sigma-Aldrich

Pyridine

≥99%

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About This Item

Empirical Formula (Hill Notation):
C5H5N
CAS Number:
110-86-1
Molecular Weight:
79.10
Beilstein:
103233
EC Number:
203-809-9
MDL number:
MFCD00011732
UNSPSC Code:
12352103

Key Documents

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vapor density

2.72 (vs air)

vapor pressure

10 mmHg ( 13.2 °C)
20 mmHg ( 25 °C)

Assay

≥99%

autoignition temp.

899 °F

expl. lim.

12.4 %

refractive index

n20/D 1.509 (lit.)

bp

115 °C (lit.)

mp

−42 °C (lit.)

solubility

water: soluble

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

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Pictograms

FlameExclamation mark
GHS02,GHS07

Signal Word

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 Code

3 - Flammable liquids

WGK

WGK 2

Flash Point(F)

68.0 °F - closed cup

Flash Point(C)

20 °C - closed cup

Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
112K05921
089F0119
072H0887
057H1136
055H1508

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Direct determination of citric acid in milk with an improved pyridine-acetic anhydride method.
Marier JR and Boulet M.
Journal of Dairy Science, 41(12), 1683-1692 (1958)
Porous monodisperse V2O5 microspheres as cathode materials for lithium-ion batteries.
Wang S, et al.
Journal of Materials Chemistry, 21(17), 6365-6369 (2011)
Metal-organic frameworks based on iron oxide octahedral chains connected by benzenedicarboxylate dianions.
Whitfield TR, et al.
Solid State Sciences, 7(9), 1096-1103 (2005)
The far-infrared spectra of metal-halide complexes of pyridine and related ligands.
Clark RJH and Williams CS.
Inorganic Chemistry, 4(3), 350-357 (1965)
An investigation of Knoevenagel condensation reaction in microreactors using a new zeolite catalyst.
Zhang X, et al.
Applied Catalysis A: General, 261(1), 109-118 (2004)
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