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Minimum Order
Localité:
China
Prix de commande minimale:
-
Commande minimale:
-
Packaging Detail:
25KG/CTN
Delivery Time:
Promptly
Supplying Ability:
-
Payment Type:
T/T, L/C
China
Personne àcontacter danhua
Room 4105, Huagang International Business Building, No. 2, Chengshan Road, Jiangyin Jiangsu, China., Wuxi, Jiangsu
Ascorbic Acid is a white or slightly yellow crystals or powder,a little acid.m.p.**0℃***2℃，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.
| ITEM | STANDARD |
| Appearance | White or almost white crystal or crystalline powder |
| Identification | Positive |
| Melting point | **1 ℃ ~ **2℃ |
| pH (5%, w/v) | 2.2 ~ 2.5 |
| pH (2%,w/v) | 2.4 ~ 2.8 |
| Specific optical rotation | **0.5° ~ **1.5° |
| Clarity of solution | Clear |
| Heavy metals | ≤0.***3% |
| Assay (as C 6H 8O6, %) | *9.0 ~ **0.5 |
| Copper | ≤3 mg/kg |
| Iron | ≤2 mg/kg |
| Mercury | ≤1 mg/kg |
| Arsenic | ≤2 mg/kg |
| Lead | ≤2 mg/kg |
| Oxalic acid | ≤0.2% |
| Loss on drying | ≤0.1% |
| Sulphated ash | ≤ 0.1% |
| Residual solvents (as methanol) | ≤ **0 mg/kg |
| Total plate count (cfu/g) | ≤ ***0 |
| Yeasts & molds (cfu/g) | ≤ **0 |
| Escherichia. Coli/g | Absence |
| Salmonella/ *5g | Absence |
| Staphylococcus aureus/ *5g | Absence |
