4-Aminopyridine Chemical Properties
Melting point 157 °C
Boiling point 273 °C(lit.)
density 1.26
refractive index 1.5560 (estimate)
Fp 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)
Safety Information
Hazard Codes T+,N,T,Xi
Risk Statements 28-36/37/38-51/53-23/24/25
Safety Statements 26-36/37/39-45-60-61-37/39-28A-1
RIDADR UN 2671 6.1/PG 2
WGK Germany 3
RTECS US1750000
F 8-21
Autoignition Temperature 640 °C
Hazard Note Toxic/Irritant
TSCA Yes
HazardClass 6.1
PackingGroup II
HS Code 29333999
Hazardous Substances Data 504-24-5(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 21 mg/kg