Structural formula:

Molecular formula:C₄H₁₁N₅.HCI
Molecular weight:165.63
Property:White crytal or crystal powder,odorless , easily soluble in water, soluble in methanol, slightly soluble in ethanol, insoluble in chloroform or aether.
Specification:China Pharmacopoeia 2005 edition
    Loss on drying: Not more than 0.5%
    Assay: Not less than 98.5%(dry)
    Residue on ignition: Not more than 0.1%
    Melting point:220-225℃
    Heavy metals: Not more than 20ppm
    Related substances:Accord with standard
Use: Lower blood glucose medicine.