1.Guanidine Hydrochloride; 2.about the GMP level;Structural Formula: HN=C(NH2)2•HCLMolecular: CH5N3•HCL F.W: 95.54 Standards and Specification: including industrial and medical Grade. Item TitlesSpecificationsGrade AGrade BAppearanceWhite crystalWhite crystalContent ≥99%98%NaCl ≤0.2%0.5%Water-Insoluble Matter ≤0.2%0.3%Water Content ≤0.3%0.5%Ash ≤0.15%0.2%Solubility Test(In water)Passes testPasses test