Application:Ascorbic acid is the enolic form of 3-oxo-L- gulofuranolac-tone. It can be prepared by synthesis from glucose, or extracted from plant sources such as rose hips, blackcurrants or citrus fruits. It is easily oxidized in air. It is a white or slightly yellow crystals or powder,a little acid.m.p.190°C-192°C,easily soluble in water,a little soluble in alcohol and uneasily soluble in Ether and chlorofom and other organic solvent.In solid state it is stable in air.Its water solution is easliy mutated when it meets with air.
White or almost white crystal or crystalline powder
191 °C ~ 192°C
pH (5%, w/v)
2.2 ~ 2.5
2.4 ~ 2.8
Specific optical rotation
+20.5° ~ +21.5°
Clarity of solution
Assay (as C 6H 8O6, %)
99.0 ~ 100.5
Loss on drying
Residual solvents (as methanol)
≤ 500 mg/kg
Total plate count (cfu/g)
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