Test Items

Requirements

Property

White crystalline powder, odorless, bitter, with hygroscopicity

Soluble in water, insoluble in chloroform or ethyl ether

Melting point: 205-221°C

Identification

1. Positive reaction

2. Positive reaction

3. Positive reaction

Test

1. PH value: 5.5-6.5

2. Clarity and color of solution

3. Loss of drying: dry it at 105°C until constant weight, loss of weight is no more than 2.0%.

4. Residue on ignition: no more than 0.1%.

Assay

Calculated by anhydrous material, the assay of Guanoxani sulfas (C10H13N2O31/2H2SO4) is no less than 98.0%.