info@mixfoodgroup.com
86 15221870316
Vitamin C is a white monoclinic crystal or crystalline powder with melting point on 190 ℃ -192 ℃, no smell, sour, yellowish color after long time standing. The product is easily soluble in water, slightly soluble in ethanol, insoluble in ether, chloroform. The aqueous solution is acidic. 5% (W / V) aqueous solution PH2.1-2.6 (W / V), the rotation of aqueous solution is +20.5 ° ~ +21.5°.
|
ITEM |
STANDARD |
|
Appearance |
White or almost white crystal or crystalline powder |
|
Identification |
Positive |
|
Melting point |
191 ℃ ~ 192℃ |
|
pH (5%, w/v) |
2.2 ~ 2.5 |
|
pH (2%,w/v) |
2.4 ~ 2.8 |
|
Specific optical rotation |
+20.5° ~ +21.5° |
|
Clarity of solution |
Clear |
|
Heavy metals |
≤0.0003% |
|
Assay (as C 6H 8O6, %) |
99.0 ~ 100.5 |
|
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) |
≤500 mg/kg |
|
Total plate count (cfu/g) |
≤ 1000 |
|
Yeasts & molds (cfu/g) |
≤100 |
|
Escherichia. Coli/g |
Absence |
|
Salmonella/ 25g |
Absence |
|
Staphylococcus aureus/ 25g |
Absence |
Name: Mixfood Sales
Mobile：86 15221870316
Tel：86 15221870316
Whatsapp：86 15221870316
Email：info@mixfoodgroup.com
Add：Building 1, 385 Yubei Road, Shanghai, China
