Formula: C₁₀H₁₄N₅O₁₃P₃Na₂x3 H₂O
Molecular weight: 605.2 D (ATP: 507.2 D)
Appearance: White crystals
Solubility: Clear, colorless solution in water (c=50 mg/ml)
ATP-Na₂ x 3 H₂O (based on value found enzymatically): ≥98%
ATP (enzymatically): ≥82%
ATP (A₂₆₀, ε=15.0 [l x mmol^-1 x cm^-1]): ≥82%
Na (flame photometric): 7.5±0.5%
Water (K. Fischer): ≤10%
P_i: ≤0.3%
ADP, AMP (enzymatically): ≤0.5%
GTP (HPLC): ≤0.01 area%
Fe (AAS): ≤15 ppm
Heavy metals (as Pb): ≤30 ppm
A₂₅₀/A₂₆₀: 0.79±0.02
A₂₈₀/A₂₆₀: 0.15±0.01
A₂₉₀/A₂₆₀: ≤0.01
Stability: At +2 to +8°C within specification range for 24 months.