Testing Item
|
Standard
|
Result
|
Appearance
|
White crystalline granular
|
White crystalline granular
|
Assay
|
98.0-102.0 %
|
99.20 %
|
Specific Rotation [α]D20
|
+14.50°~+16.50°
|
+15.20 °
|
Loss on Drying
|
≤ 4.50 %
|
2.71 %
|
Residue On Ignition(Sulphate Ash)
|
≤ 0.20 %
|
0.06 %
|
pH (0.8% w/v in water)
|
4.50 - 6.00
|
5.24
|
Diketopiperazine (DKP)
5-benzyl-3.6-dioxo-2-Piperazineacetic acid |
≤ 1.5 %
|
< 1.5 %
|
Other Related impurities
Chromatographic purity |
≤ 2.0 %
|
< 2.0 %
|
Transmittance
|
≥ 0.95
|
0.992
|
Heavy Metals (as Pb)
|
≤ 10 mg/kg
|
< 10 mg/kg
|
(as As)
|
≤ 3 mg/kg
|
< 3 mg/kg
|
Lead
|
≤ 1 mg/kg
|
< 1 mg/kg
|
Residual Solvents
|
Meet the requirements
|
Conform
|
Particle Size
|
20-60 Mesh
|
Conform
|
1. Made in China and exported to many countries and regions at the most favorable price.