Formula Weight: 833.35

Formula: C₂₁H₂₆N₇O₁₇P₃Na₄

UV Spectral Analysis: Ratios at pH 10.0
A₃₄₀/A₂₆₀ (0.43 ± 0.02)
ε at 260nm(14.4 ± 0.5) x 10³
ε at 340nm (6.2 ± 0.2) x 10³

Purity: Determined by decrease in absorbance at 340 nm on enzymatic reduction with GR*at pH 10.0 (≧ 95%)
*GR = Glutathion reductase (yeast)(EC 1.6.4.2.)

Sodium Content: 10.0 ± 2.0% by flame photometyl

Water Content: < 8% by Karl Fischer

Condition for Storage:
Keep tightly stoppered in the dark below 5°C.
Moisture will reduce the purity.
For prolonged storage, keep below -20°C.
Unstable in acids, but relatively stable at pH 10-11.

Shipping Condition: Refrigerate