9.Guanosine-5’-Monophosphate, Disodium Salt(5’-GMP,Na2）
| Nucleotide | Cas No. | Empirical Chemical Formula |
|---|---|---|
| Guanosine-5’-Monophosphate,Disodium salt | 5550-12-9 | C10H12N5Na2O8P・7.0・H2O |
| Test Items | Specifications |
|---|---|
| Appearance | White crystal or crystalline powder |
| Odor or Taste | Odourless and has a characteristic taste |
| Solubility | Soluble in water, sparingly soluble in ethanol, |
| Practically insoluble in ether | |
| Identification UV | 252±2nm |
| max. (PH7.0) | In the range 1.12～1.18 |
| R1-A250/260 (PH7.0) | In the range 0.63～0.71 |
| R2-A280/260 (PH7.0) | |
| Assay (UV or HPLC) | N.L.T98% (on dry basis) |
| Impurity (HPLC) | Related subs N.M.T 3% |
| Transparence 430nm | N.M.T 95.0% |
| PH | in the range 7.0～8.5 |
| Loss on drying | N.M.T 25.0% (4hrs @ 120℃) |
| Amino acid | Negative |
| Ammonium salts | Negative |
| Related foreign substances | Negative |
| Heavy metals (Pb) | N.M.T 5.0mg/kg |
| Arsenic | N.M.T 2.0mg/kg |
| APC | N.M.T 1000cfu/g |
| Mould and Yeast | N.M.T 25cfu/g |
| Coliforms | N.M.T 30MPN/100g |
| E.Coli | Negative |
| Salmonella | Negative |