Formula: C6H4NO6PNa2 x 6 H2O
Molecular weight: 371.1 D (pNPP: 219.1 D)
Detection: at 405 nm Appearance: White to slightly yellow crystalline powder
Solubility: Clear, colorless to slightly yellow solution in water (c=50
mg/mL)
pH value: 9±1 4-NPP-Na2 x 6 H2O (calculated from value found enzymatically): ≥95%
4-NPP (enzymatic): ≥56%
Na (flame photometric): 13±1%
Water (K. Fischer): 28±3%
4-Nitrophenol (free): ≤0.07%
Pi: ≤ 0.3%
Blank (with TC APopt. ΔA/30 min) : ≤0.015
Reactions rates (AP): 100±5%
Stability: At +2 to +8°C within specification range for 24 months.
Protect from light