676772

Pyridine

ACS reagent, ≥99.0%

• Empirical Formula (Hill Notation): C₅H₅N
• CAS Number: 110-86-1
• Molecular Weight: 79.10
• Beilstein/REAXYS Number: 103233
• EC Number: 203-809-9
• MDL number: MFCD00011732
• UNSPSC Code: 12352005
• PubChem Substance ID: 329760652

Properties

• grade: ACS reagent
• vapor density: 2.72 (vs air)
• vapor pressure: 10 mmHg ( 13.2 °C); 20 mmHg ( 25 °C)
• assay: ≥99.0%
• form: liquid
• autoignition temp.: 899 °F
• expl. lim.: 12.4 %
• impurities: ≤0.002% NH₃; 0.1% water
• evapn. residue: ≤0.002%
• refractive index: n20/D 1.509 (lit.)
• pH: 8.5 (25 °C, 15.82 g/L)
• 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 (SO₄^2-): ≤0.001%
• cation traces: Cu: ≤5 ppm
• SMILES string: C1=CN=CC=C1
• InChI: 1S/C5H5N/c1-2-4-6-5-3-1/h1-5H
• InChI key: JUJWROOIHBZHMG-UHFFFAOYSA-N

Description

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 have been analyzed and the values obtained were used to calculate its thermodynamic properties. Photodegradation and bacterial degradation of Pyr has been studied.

Application

Pyridine may be used in the synthesis of the following:

• complexes with cobalt(II) halides
• pyridine-d ₅, a deuterated form of pyridine
• ionic liquid matrices (ILMs)

Safety Information

• pictograms: GHS02,GHS07
• signalword: Danger
• hcodes: H225,H302 + H312 + H332,H315,H319
• pcodes: P210 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P312 - P305 + P351 + P338
• 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_germany: WGK 2
• flash_point_f: 68.0 °F - closed cup
• flash_point_c: 20 °C - closed cup