494410

Pyridine

biotech. grade, ≥99.9%

• 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: 329757450
• NACRES: NA.21
• grade: biotech. grade
• assay: ≥99.9%
• bp: 115 °C (lit.)
• vapor pressure: 10 mmHg ( 13.2 °C); 20 mmHg ( 25 °C)

Properties

• grade: biotech. grade
• vapor density: 2.72 (vs air)
• vapor pressure: 10 mmHg ( 13.2 °C); 20 mmHg ( 25 °C)
• assay: ≥99.9%
• form: liquid
• autoignition temp.: 899 °F
• expl. lim.: 12.4 %
• impurities: ≤0.002% NH₃; ≤0.003% water
• evapn. residue: <0.0003%
• 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:, passes test (limit about 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,[1] pyridine alkaloids,[2] pyridine-based polymers[3] and pyridine-containing macrocycles.[4] It has wide application as a solvent, catalyst and as an intermediate for synthesis.[5] IR, Raman and UV spectra of pyridine have been analyzed and the values obtained were used to calculate its thermodynamic properties.[6] Photodegradation[7] and bacterial degradation of Pyr has been studied.[8]

Application

Pyridine may be used in the synthesis of the following:

• complexes with cobalt(II) halides[9]
• pyridine-d ₅, a deuterated form of pyridine[10]
• ionic liquid matrices (ILMs)[11]

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