Merck
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270970

Sigma-Aldrich

Pyridine

anhydrous, 99.8%

Empirical Formula (Hill Notation):
C5H5N
CAS Number:
Molecular Weight:
79.10
Beilstein:
103233
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

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

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33553P57506360570
Pyridine anhydrous, 99.8%

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Pyridine

Pyridine ACS reagent, &#8805;99.0%

Sigma-Aldrich

360570

Pyridine

grade

anhydrous

grade

ACS reagent, puriss. p.a.

grade

-

grade

ACS reagent

vapor density

2.72 (vs air)

vapor density

2.72 (vs air)

vapor density

2.72 (vs air)

vapor density

2.72 (vs air)

vapor pressure

10 mmHg ( 13.2 °C), 20 mmHg ( 25 °C)

vapor pressure

10 mmHg ( 13.2 °C), 20 mmHg ( 25 °C)

vapor pressure

10 mmHg ( 13.2 °C), 20 mmHg ( 25 °C)

vapor pressure

10 mmHg ( 13.2 °C), 20 mmHg ( 25 °C)

assay

99.8%

assay

≥99.5% (GC)

assay

≥99%

assay

≥99.0%

form

liquid

form

liquid

form

liquid

form

liquid

autoignition temp.

899 °F

autoignition temp.

899 °F

autoignition temp.

899 °F

autoignition temp.

899 °F

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 (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.
Pyridine may be used as a base for the conversion of:
  • 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.

Pictograms

FlameExclamation mark

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

FSL

Flammable liquids
Type 1 petroleums
Hazardous rank II
Water soluble liquid

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

270970-100ML:4.548173964324E12
270970-1L:4.548173964331E12
270970-2L:4.548173964348E12


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