Guanidine phosphate CAS#5423-23-4
High Purity and Appearance – Appears as a white crystalline powder or crystal; high-purity products are pure white and free of visible impurities.
Excellent Water Solubility – Highly soluble in water, forming a colorless and transparent solution, even at concentrations like 4%.
Stable Aqueous Solution – Solutions remain clear without turbidity, ensuring reliable performance in applications requiring aqueous media.
Selective Solubility – Poor solubility in organic solvents, making it suitable for applications where water solubility is preferred and organic solvent interference is undesirable.
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.




