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Pyridine Structure

Pyridine

  • Product NamePyridine
  • CAS110-86-1
  • CBNumberCB8852825
  • MFC5H5N
    Lewis structure
  • MW79.1
  • EINECS203-809-9
  • MDL NumberMFCD00011732
  • MOL File110-86-1.mol
  • MSDS FileSDS

Chemical 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℃
Substances Added to Food (formerly EAFUS) PYRIDINE
FDA 21 CFR 177.1580
CAS DataBase Reference 110-86-1(CAS DataBase Reference)
EWG's Food Scores 9
FDA UNII NH9L3PP67S
Proposition 65 List Pyridine
IARC 2B (Vol. 77, 119) 2019
NIST Chemistry Reference Pyridine(110-86-1)
EPA Substance Registry System Pyridine (110-86-1)

Safety

Symbol(GHS)
Signal wordDanger
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
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
NFPA 704:
3
3 0

Pyridine Price

Pyridine Chemical Properties,Usage,Production

Pyridine synthesis

Pyridine Supplier

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-- webmestre-substances@ineris.fr France 6027 58
-- r.eckert@rothsochiel.fr France 2362 58
-- interchim@interchim.com France 6307 76

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