Pyridine

grade

ACS reagent, puriss. p.a.

agency

reag. Ph. Eur.

Quality Level

200

vapor pressure

10 mmHg ( 13.2 °C), 20 mmHg ( 25 °C)

assay

≥99.5% (GC)

form

liquid

autoignition temp.

899 °F

technique(s)

GC/GC: suitable

impurities

≤0.0005% KMnO₄ red. matter (as O), ≤0.002% ammonia (NH₃), ≤0.002% non-volatile matter, ≤0.01% piperidine (GC), ≤0.1% water (Karl Fischer), ≤0.2% 2-picoline (GC)

refractive index

n20/D 1.509 (lit.)

pH

8.5 (25 °C, 15.82 g/L)

mp

−42 °C (lit.)

solubility

H₂O: in accordance

anion traces

chloride (Cl^-): ≤5 mg/kg, sulfate (SO₄^2-): ≤5 mg/kg

cation traces

Al: ≤0.5 mg/kg, B: ≤0.02 mg/kg, Ba: ≤0.1 mg/kg, Ca: ≤0.5 mg/kg, Cd: ≤0.05 mg/kg, Co: ≤0.02 mg/kg, Cr: ≤0.02 mg/kg, Cu: ≤0.03 mg/kg, Fe: ≤0.1 mg/kg, Mg: ≤0.1 mg/kg, Mn: ≤0.02 mg/kg, Ni: ≤0.02 mg/kg, Pb: ≤0.1 mg/kg, Sn: ≤0.1 mg/kg, Zn: ≤0.1 mg/kg