Ascorbic acid is a white or slightly yellow crystals or powder,easily soluble in water,a little soluble in alcohol and uneasily soluble in Ether and chloroform and other organic solvent.In solid state it is stable in air.Its water solution is easily mutated when it meets with air.
|
Item |
Specification |
|
Characteristics |
White crystalline powder |
|
Identification |
Positive reaction |
|
Melting point |
About 190 |
|
pH |
2.1 ~ 2.6 |
|
Clarity of solution |
Clear |
|
Color of solution |
BY7 Max. |
|
Iron |
2ppm Max. |
|
Copper |
5ppm Max. |
|
Arsenic |
3ppm Max. |
|
Oxalic acid |
0.2% Max. |
|
Heavy metals |
10ppm Max. |
|
Sulphated ash |
0.1% Max. |
|
Specific optical rotation |
+20.5 ~ +21.5º |
|
Assay |
99.0 % Min. |
Ascorbic acid is a white or slightly yellow crystals or powder,easily soluble in water,a little soluble in alcohol and uneasily soluble in Ether and chloroform and other organic solvent.In solid state it is stable in air.Its water solution is easily mutated when it meets with air.
