Test Items

Units

Specifications

Assay CH₃CN(GC)

%

≥99.99

Density(20℃)

g/mL

0.782～0.785

Solubility with H₂O

Pass test

Residue on evaporation

%

≤0.0001

Water

%

≤0.01

Acidity(as H⁺)

mmol/g

≤0.0002

Alkalinity(as OH^-)

mmol/g

≤0.0001

Absorbance at 190 nm

Abs.Units

≤0.60

Absorbance at 195 nm

Abs.Units

≤0.07

Absorbance at 200 nm

Abs.Units

≤0.01

Absorbance at 210 nm

Abs.Units

≤0.01

Absorbance at 220 nm

Abs.Units

≤0.008

Absorbance at 230 nm

Abs.Units

≤0.004

Absorbance at 240 nm

Abs.Units

≤0.004

Absorbance at 254 nm

Abs.Units

≤0.004

254nm Gradient Elution Test

mAU

≤0.5

210nm Gradient Elution Test

mAU

≤2

Fluorescence impurity at 254 nm

ppb

≤0.5

Fluorescence impurity at 365 nm

ppb

≤0.5

LC-MS(ESI⁺) as reserpine

ppb

≤50

LC-MS(ESI^-) as 4-nitrophrnol

ppb

≤50

(K、Ag、Ba、Cd、Co、Cr、Cu、Mn、Ni、Pb、Sn)

ppb

≤5

Al、Ca、Mg、Fe

ppb

≤10

Na

ppb

≤50