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
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