Melting point: :157 °C
Boiling point: :273 °C(lit.)
Density  :1.26
refractive index  :1.5560 (estimate)
Flash point: :156°C
storage temp.  : 0-6°C
solubility  :H2O: soluble50mg/mL, clear, colorless
pka :9.114(at 25℃)
form  :Crystalline Powder, Solid or Crystals
color  :White to faint grey to light yellow
Water Solubility  :Soluble in water(112 g/L at 20 deg C). Soluble in ethyl ether, benzene. Slightly soluble in ligroin. Very soluble in ethanol. Soluble in methanol, acetone, tetrahydrofuran, isopropanol, acetonitrile, N,N-dimethylformamide, dimethylsulfoxide, and ethanol.
Merck  :14,3933
BRN  :105782
InChIKey :NUKYPUAOHBNCPY-UHFFFAOYSA-N
CAS DataBase Reference :504-24-5(CAS DataBase Reference)
NIST Chemistry Reference :4-Pyridinamine(504-24-5)
EPA Substance Registry System :4-Aminopyridine (504-24-5)

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 H311 Toxic in contact with skin Acute toxicity,dermal Category 3 Danger P280, P302+P352, P312, P322, P361,P363, 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 H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501 H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501 H401 Toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 2 P273, P501 H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:	P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P391 Collect spillage. Hazardous to the aquatic environment P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. 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. P307+P311 IF exposed: call a POISON CENTER or doctor/physician. P405 Store locked up. P501 Dispose of contents/container to..…