ethyl ascorbic acid manufacturer vitamin c powder

Review

Product Parameter

Item	Standard
Appearance	White or almost white, crystalline powder or colourless crystals
Melting point	About 190℃. with decomposition
Infrared absorption spectrum	Infrared absorption spectrum accord with the referance spectrum of ascorbic acid CRS
PH(With 5% water solution)	2.1~2.6
PH(With 2% water solution)	2.4~2.8
Appearance of solution	Clarity; clear; colour: ≤BY7
Loss on drying	≤0.4%
Impurity E	≤0.2%
Related substance	Impurity C: ≤0.15%
	Impurity D: ≤0.15%
	Unpecified impurities:≤0.10%
	Total impurities:≤0.20%
Copper ≤5.0ppm	Iron ≤2.0ppm	Arisenic ≤3.0ppm
Lead ≤2.0ppm	Mercury ≤1.0ppm	Cadmium ≤1.0ppm
Heavy metals ≤10ppm	Sulphated ash ≤0.1%	Assay：99.0% ~ 100.5%