Purity (GC): ≥ 99.9 %

Evaporation residue: ≤ 0.0002 %

Water: ≤ 0.005 %

Colour: ≤ 10 Hazen

Acidity: ≤ 0.0002 meq/g

Alkalinity: ≤ 0.0002 meq/g

Fluorescence (as quinine at 254 nm): ≤ 1.0 ppb

Fluorescence (as quinine at 365 nm): ≤ 1.0 ppb

Transmission (at 208 nm): ≥ 20 %

Transmission (at 220 nm): ≥ 55 %

Transmission (at 230 nm): ≥ 80 %

Transmission (at 240 nm): ≥ 90 %

Transmission (from 250 nm): ≥ 98 %

Absorbance (at 208 nm): ≤ 0.70

Absorbance (at 220 nm): ≤ 0.26

Absorbance (at 230 nm): ≤ 0.10

Absorbance (at 240 nm): ≤ 0.05

Absorbance (from 250 nm): ≤ 0.01

Meet the requirements of "Specific use spectroscopy" according ACS and Reag. Ph Eur