四氢呋喃

产品名称

四氢呋喃, contains 250 ppm BHT as inhibitor, puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99.9%

grade

ACS reagent, puriss. p.a.

agency

reag. Ph. Eur.

Quality Level

200

vapor pressure

114 mmHg ( 15 °C), 143 mmHg ( 20 °C)

assay

≥99.9%

form

liquid

autoignition temp.

610 °F

contains

250 ppm BHT as inhibitor, ~0.025% 2,6-di-tert-butyl-4-methylphenol as stabilizer

expl. lim.

1.8-11.8 %

technique(s)

solid phase extraction (SPE): suitable

impurities

≤0.001% free acid (as CH₃COOH), ≤0.005% peroxides (as H₂O₂), ≤0.05% water

evapn. residue

≤0.001%

pH

~7

mp

−108 °C (lit.)

density

0.887 g/mL at 20 °C, 0.889 g/mL at 25 °C (lit.)

cation traces

Al: ≤0.5 mg/kg, B: ≤0.02 mg/kg, Ba: ≤0.1 mg/kg, Bi: ≤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: ≤0.02 mg/kg, Fe: ≤0.1 mg/kg, K: ≤0.5 mg/kg, Li: ≤0.1 mg/kg, Mg: ≤0.1 mg/kg, Mn: ≤0.02 mg/kg, Mo: ≤0.1 mg/kg, Na: ≤0.5 mg/kg, Ni: ≤0.02 mg/kg, Pb: ≤0.1 mg/kg, Sn: ≤0.1 mg/kg, Sr: ≤0.1 mg/kg, Zn: ≤0.1 mg/kg