Melting point :159-162 °C (lit.)
Boiling point :256.56°C (rough estimate)
Density :1.5657 (rough estimate)
refractive index :1.4800 (estimate)
storage temp. :Inert atmosphere,Room Temperature
solubility :soluble in DMSO
pka :-1.37±0.10(Predicted)
form :Crystals or Powder
color :Yellow to brown
Water Solubility :insoluble
BRN :124331
InChI :InChI=1S/C5H4N2O3/c8-6-3-1-5(2-4-6)7(9)10/h1-4H
InChIKey :RXKNNAKAVAHBNK-UHFFFAOYSA-N
SMILES :C1[N+]([O-])=CC=C([N+]([O-])=O)C=1
CAS DataBase Reference :1124-33-0(CAS DataBase Reference)
NIST Chemistry Reference :Pyridine-1-oxide, 4-nitro-(1124-33-0)
EPA Substance Registry System :4-Nitropyridine-1-oxide (1124-33-0)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H300 Fatal if swallowed Acute toxicity,oral Category 1, 2 Danger P264, P270, P301+P310, P321, P330,P405, P501 H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501 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 H341 Suspected of causing genetic defects Germ cell mutagenicity Category 2 Warning P201,P202, P281, P308+P313, P405,P501
Precautionary statements:	P201 Obtain special instructions before use. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405 Store locked up.