Melting point :<25 °C
Boiling point :62-65 °C/15 mmHg (lit.)
Density :0.975 g/mL at 25 °C (lit.)
vapor pressure :2.28hPa at 25℃
refractive index :n20/D 1.549(lit.)
Flash point :125 °F
storage temp. :-20°C
solubility :Chloroform, Methanol (Slightly)
form :Liquid
pka :pK1:5.62(+1) (25°C)
color :Clear colorless to yellow-brown
Water Solubility :29 G/L (20 ºC)
BRN :104506
Exposure limits :ACGIH: TWA 1 mg/m3
OSHA: TWA 2 mg/m3
NIOSH: IDLH 50 mg/m3; Ceiling 2 mg/m3 Stability :Stable. Incompatible with strong acids, strong oxidizing agents.
LogP :1.36 at 20℃
CAS DataBase Reference :100-43-6(CAS DataBase Reference)
NIST Chemistry Reference :Pyridine, 4-ethenyl-(100-43-6)
EPA Substance Registry System :4-Vinylpyridine (100-43-6)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H226 Flammable liquid and vapour Flammable liquids Category 3 Warning H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.