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A6705512

Pyridine , StandardforGC,>99.9%(GC) , 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

Update time: 2022-07-08

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)
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℃

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
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

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