ITEM
|
SPECIFICATION
|
Appearance
|
White crystal powder
|
Odor
|
Characteristic smell
|
Melting point
|
111.0ºC-115.0ºC
|
Assay By HPLC
|
≥99%
|
PH
|
4.0-5.0
|
Chroma
|
≤25
|
Moisture
|
≤1%
|
Ash
|
≤0.1%
|
Heavy metal
|
≤20ppm
|
As
|
≤2ppm
|
Free Vitamin C
|
≤10ppm
|