Product name: pure pyridine gauge: 99.7% package shipment: 190 kg/barrel/water 

Appearance and properties: colorless or light yellow liquid

Melting point (℃) : 41.6

Boiling point (℃) : 115.3

Relative density (water = 1) : 0.9827

The refractive index: 1.5067 (25 ℃)

Relative vapor density (air = 1) : 2.73

Saturated vapor pressure (kPa) : 1.33/13.2 ℃

Flash point (℃) : 17

Ignition temperature (℃) : 482

Explosion limit % (V/V) : 12.4

Lower explosive limit % (V/V) : 1.7

Heat of combustion (constant pressure) (KJ/mol) : 2826.51 [1]

(constant volume) (KJ/mol) : 2782.97 [1]

The constant pressure heat capacity (21 ℃) (KJ/kg. K) : 1.64 [1]

Critical temperature (℃) : 346.85 [1]

Critical pressure (MPa) : 6.18 [1]

Conductivity (25 ℃) (mu S/cm) : 4 [1]

Thermal conductivity (20 ℃) (W/m.K) : 0.182 [1]

Viscosity (15 ℃) (mPa) S) : 1.038 [1]

（20℃）（mPa.S）：0.952[1]

（30℃）（mPa.S）：0.829[1]

Heat of evaporation (25 ℃) (KJ/mol) : 40.4277 [1]

Heat of fusion (KJ/mol) : 7.4133 [1]