Vitamin C with cheaper price

ITEM

STANDARD

Appearance

White or almost white crystal or crystalline powder

Identification

Positive

Melting point

191 °C ~ 192°C

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