Melting point :182-185 °C(lit.)
Boiling point :152°C 11mm
Density :1.1143 (rough estimate)
refractive index :1.5180 (estimate)
Flash point :149 °C
storage temp. :Store at +2°C to +8°C.
solubility :1000g/l
pka :1.38±0.10(Predicted)
form :powder to crystal
color :White to Light yellow to Light orange
PH :>7 (H2O, 25℃)Aqueous solution
Water Solubility :soluble
Sensitive :Hygroscopic
BRN :106329
CAS DataBase Reference :1003-67-4(CAS DataBase Reference)
NIST Chemistry Reference :Pyridine, 4-methyl-, 1-oxide(1003-67-4)
EPA Substance Registry System :Pyridine, 4-methyl-, 1-oxide (1003-67-4)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.