Pyridine manufacturers and suppliers

Pyridine suppliers

Properties

Melting point:: -42 °C (lit.)

Boiling point:: 115 °C (lit.)

Density: 0.978 g/mL at 25 °C (lit.)

vapor density: 2.72 (vs air)

vapor pressure: 23.8 mm Hg ( 25 °C)

FEMA: 2966 | PYRIDINE

refractive index: n20/D 1.509(lit.)

Flash point:: 68 °F

storage temp.: Store at +5°C to +30°C.

solubility: H2O: in accordance

form: Liquid

pka: 5.25(at 25℃)

color: colorless

Odor: Nauseating odor detectable at 0.23 to 1.9 ppm (mean = 0.66 ppm)

Relative polarity: 0.302

PH: 8.81 (H2O, 20℃)

explosive limit: 12.4%

Odor Threshold: 0.063ppm

Odor Type: fishy

Water Solubility: Miscible

FreezingPoint: -42℃

λmax: λ: 305 nm Amax: 1.00
λ: 315 nm Amax: 0.15
λ: 335 nm Amax: 0.02
λ: 350-400 nm Amax: 0.01

Merck: 14,7970

BRN: 103233

Henry's Law Constant: 18.4 at 30 °C (headspace-GC, Chaintreau et al., 1995)

Exposure limits: TLV-TWA 5 ppm (～15 mg/m³) (ACGIH, MSHA,and OSHA); STEL 10 ppm (ACGIH), IDLH 3600 ppm (NIOSH).

Dielectric constant: 12.5（20℃）

Stability:: Stable. Flammable. Incompatible with strong oxidizing agents, strong acids.

InChIKey: JUJWROOIHBZHMG-UHFFFAOYSA-N

LogP: 0.64 at 20℃

Safety Information

Symbol(GHS): GHS02,GHS07

Signal word: Danger

Hazard statements: H225-H302+H312+H332-H315-H319

Precautionary statements: P210-P280-P301+P312-P303+P361+P353-P304+P340+P312-P305+P351+P338

Hazard Codes: T,N,F,Xn

Risk Statements: 11-20/21/22-39/23/24/25-23/24/25-52-36/38

Safety Statements: 36/37/39-38-45-61-28A-26-28-24/25-22-36/37-16-7

RIDADR: UN 1282 3/PG 2

WGK Germany: 2

RTECS: UR8400000

F: 3-10

Autoignition Temperature: 482 °C

Hazard Note: Highly Flammable/Harmful

TSCA: Yes

HS Code: 2933 31 00

HazardClass: 3

PackingGroup: II

Toxicity: LD50 orally in rats: 1.58 g/kg (Smyth)

IDLA: 1,000 ppm

Use

Pyridine (Formula is C6H5N) is a six-membered heterocyclic compound containing one nitrogen heteroatom. It is structurally related to benzene, with one methine group (=CH-) replaced by a nitrogen atom. Just like benzene, Pyridine has same electronic structure, and it is still aromatic, so it is also known as nitrogen benzene and azobenzene. Pyridine is a colorless liquid with special odor at room temperature, and melting point is -41.6 ℃, and boiling point is 115.2 ℃. It will form azeotropic mixture with water, and boiling point of the mixture is 92 ~ 93 ℃(The property is used to purify pyridine in industry.) Its density is 0.9819g / cm3. Pyridine is soluble in water, ethanol, ether and other organic solvents, and itself can also be used as solvent. Pyridine was discovered in 1849 by the Scottish chemist Thomas Anderson as one of the constituents of bone oil. Two years later, Anderson isolated pure pyridine through fractional distillation of the oil.

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