Pyridine , AR,≥99.5% , 110-86-1

Synonym(s):
Azabenzene;Azine, Azabenzene;Pyridine

CAS NO.：110-86-1

Empirical Formula: C5H5N

Molecular Weight: 79.1

MDL number: MFCD00011732

EINECS: 203-809-9

PRODUCT 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)
• Dielectric constant: 12.5（20℃）
• Exposure limits: TLV-TWA 5 ppm (～15 mg/m³) (ACGIH, MSHA,and OSHA); STEL 10 ppm (ACGIH), IDLH 3600 ppm (NIOSH).
• Stability: Stable. Flammable. Incompatible with strong oxidizing agents, strong acids.
• InChIKey: JUJWROOIHBZHMG-UHFFFAOYSA-N
• LogP: 0.64 at 20℃
• CAS DataBase Reference: 110-86-1(CAS DataBase Reference)
• IARC: 2B (Vol. 77, 119) 2019
• NIST Chemistry Reference: Pyridine(110-86-1)
• EPA Substance Registry System: Pyridine (110-86-1)

Description and Uses

Pyridine is used as a solvent in paint andrubber industries; as an intermediate in dyesand pharmaceuticals; for denaturing alcohol;and as a reagent for cyanide analysis. Itoccurs in coal tar.

Safety

• 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
• OEB: A
• OEL: TWA: 5 ppm (15 mg/m3)
• 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
• Hazardous Substances Data: 110-86-1(Hazardous Substances Data)
• Toxicity: LD50 orally in rats: 1.58 g/kg (Smyth)
• IDLA: 1,000 ppm