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Merck

360570-M

Pyridine

ACS reagent, ≥99.0%

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About This Item

Empirical Formula (Hill Notation):
C5H5N
CAS Number:
110-86-1
Molecular Weight:
79.10
UNSPSC Code:
12352005
NACRES:
NA.21
PubChem Substance ID:
329755266
EC Number:
203-809-9
Beilstein/REAXYS Number:
103233
MDL number:
MFCD00011732
Grade:
ACS reagent
Assay:
≥99.0%
Bp:
115 °C (lit.)
Vapor pressure:
10 mmHg ( 13.2 °C)
20 mmHg ( 25 °C)

Key Documents

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Product Name

Pyridine, ACS reagent, ≥99.0%

InChI

1S/C5H5N/c1-2-4-6-5-3-1/h1-5H

InChI key

JUJWROOIHBZHMG-UHFFFAOYSA-N

SMILES string

C1=CN=CC=C1

grade

ACS reagent

vapor density

2.72 (vs air)

vapor pressure

10 mmHg ( 13.2 °C)
20 mmHg ( 25 °C)

assay

≥99.0%

autoignition temp.

899 °F

expl. lim.

12.4 %

dilution

(for analytical testing)

impurities

Reducing substances, passes test
≤0.002% NH3
0.1% water

evapn. residue

≤0.002%

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.)

anion traces

chloride (Cl-): ≤0.001%
sulfate (SO42-): ≤0.001%

cation traces

Cu: ≤5 ppm

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Application

Pyridine may be used in the synthesis of the following:
  • complexes with cobalt(II) halides
  • pyridine-d5, a deuterated form of pyridine
  • ionic liquid matrices (ILMs)

General description

Pyridine (Pyr) is a nitrogen containing six membered heterocyclic compound commonly used as a base. It is a colorless liquid with a fishy odor. Pyridine moiety is present as a major component in a number of compounds like pyridine nucleotides, pyridine alkaloids, pyridine-based polymers and pyridine-containing macrocycles. It has wide application as a solvent, catalyst and as an intermediate for synthesis. IR, Raman and UV spectra of pyridine has been analyzed and the values obtained were used to calculate its thermodynamic properties. Photodegradation and bacterial degradation of Pyr has been studied.

Other Notes

Important notice
This product will be phased out towards early 2019. There is a replacement product available : 360570

Packaging

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pictograms

FlameExclamation mark
GHS02,GHS07

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

wgk

WGK 2

flash_point_f

62.6 °F - closed cup

flash_point_c

17 °C - closed cup

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Jasmeet Kaur et al.
Environmental science and pollution research international, 20(6), 3956-3964 (2013-05-08)
This study demonstrates the influences of position, number of nitrogen (N) atoms and -C-N- or -N=N- linkage present in the six membered heterocyclic compounds such as pyridine, pyrazine, and pyridazine on their photocatalytic degradation by Au, Ag, and Fe(+2) deposited
R A Pandey et al.
Bioresource technology, 98(12), 2258-2267 (2006-07-04)
Industrial waste gas emissions containing pyridine are generated from pyridine manufacturing industries, and in industrial operations where pyridine is used as a solvent, as an intermediate for synthesis and as a catalyst for a variety of applications. Pyridine has unpleasant
Hani Nasser Abdelhamid et al.
Analytica chimica acta, 767, 104-111 (2013-03-05)
Application of two new series of ionic liquid matrices (ILMs) based on the two most predominantly used conventional organic matrices (Sinapinic acid and 2,5-DHB) in conjugation with various bases (aniline (ANI), dimethyl aniline (DMANI), diethylamine (DEA), dicyclohexylamine (DCHA), pyridine (Pyr)

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