Melting point :69-73℃
Boiling point :230.85°C (rough estimate)
Density :1.4317 (rough estimate)
refractive index :1.4800 (estimate)
storage temp. :Store at room temperature
pka :-2.54±0.12(Predicted)
form :powder
Appearance :Light brown to yellow Solid
InChI :1S/C5H4N2O2/c8-7(9)5-3-1-2-4-6-5/h1-4H
InChIKey :HLTDBMHJSBSAOM-UHFFFAOYSA-N
SMILES :[O-][N+](=O)c1ccccn1

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501 H312 Harmful in contact with skin Acute toxicity,dermal Category 4 Warning P280,P302+P352, P312, P322, P363,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
Precautionary statements:	P280 Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.