Guanidine phosphate, with the molecular formula CH₆N₃·H₃PO₄ (or more precisely C(NH₂)₃H₂PO₄) and a molecular weight of approximately 170.09, is a salt formed from guanidine and phosphoric acid. It typically appears as a white crystalline powder or crystals, with higher-purity products being pure white and free from visible impurities. The compound is highly soluble in water, producing a colorless and transparent solution (e.g., a 4% aqueous solution is clear), while it has low solubility in organic solvents.
Guanidine phosphate Chemical Properties
| Melting point | 247-250 °C (dec.) |
| density | 1.48 |
| vapor pressure | 0Pa at 25℃ |
| storage temp. | Room Temperature |
| solubility | H2O: 0.1 g/mL, clear, colorless |
| form | Solid |
| color | White to Off-White |
| Water Solubility | 250g/L at 20℃ |
| InChI | InChI=1S/CH5N3.H3O4P/c2-1(3)4;1-5(2,3)4/h(H5,2,3,4);(H3,1,2,3,4) |
| InChIKey | CEDDGDWODCGBFQ-UHFFFAOYSA-N |
| SMILES | C(N)(N)=N.P(O)(O)(O)=O |
| LogP | -3.48 at 25℃ |
| CAS DataBase Reference | 5423-23-4(CAS DataBase Reference) |
Safety Information
| Hazard Codes | Xn |
| Risk Statements | 20/22-36/38 |
| Safety Statements | 26-37 |
| WGK Germany | 3 |
| HS Code | 2925.29.9000 |
As a key organic intermediate, it is utilized in the synthesis of guanidine derivatives, pharmaceutical intermediates, and fine chemical products, including precursor compounds for certain antibacterial drugs and dyes. With a high content of nitrogen (approximately 25%) and phosphorus (around 18%), it can also serve as a nitrogen-phosphorus fertilizer or fertilizer additive to supply essential nutrients for crops.
