grade
for luminescence
product line
BioUltra
assay
≥99.5% (T)
total impurities
insoluble matter, passes filter test
ign. residue (900 °C)
≤0.05%
fluorescence
λex 200-600 nm; λem 300-800 nm
pH
2.5-4.0 (25 °C, 0.5 M in H2O)
useful pH range
5.5 - 6.7
pKa (25 °C)
6.1
mp
>300 °C(lit.)
solubility
H2O: 0.5 M at 20 °C, clear, colorless
anion traces
chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤50 mg/kg
cation traces
Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤20 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg
λ
0.5 M in H2O
UV absorption
λ: 260 nm Amax: 0.025
λ: 280 nm Amax: 0.020
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