Empirical formula:

C₉H₁₄N₃O₈P

Molecular weight:

323.2

CAS No:

63-37-6

Description:

White crystalline powder

Loss on drying(105℃/5h):

Not more than 5.0%

UV spectrum(Abs. max at 280nm, ε=13000±2%, pH2.0

A250/A260

0.41-0.49

A280/A260

2.03-2.17

Assay(UV spectrophotom. Calc.on dry basis):

Not less than 97.0%

HPLC

Conforms to standard,other nucleotides not detected

Heavy metals(as Pb):

Not more than 10mg/Kg

As:

Not more than 2mg/Kg

Transmission(430nm, c=1%, in 0.2mol/L NaOH):

Not less than 95.0%

Microbiological Requirements

Bacterial count:

Not more than 1000CFU/g

Yeast and molds:

Not more than 10CFU/g

Coliform germs:

Negative for 1g

Staphylococcus:

Negative for 1g

Salmonella:

Negative for 1g

Storage/Stability:

Stable at room temperature, when stored in tightly closed containers, protected from light and humidity