Food grade Ascorbic acid

Characteristics

White or almost White crystals Crystalline Powder

Identification

Positive Reaction

Melting Point

About 190°C

PH

2.1-2.6

Clarity Of Solution

Clear

Colour Of Solution

≤BY₇

Copper

≤5ppm

Heavy Metals

≤10ppm

Mercury

<0.1mg/kg

Lead

<2mg/kg

Arsenic

≤3ppm

Cadmium(Cd)

<1mg/kg

Oxalic Acid

≤0.2%

Iron

≤2ppm

Loss of Drying

≤0.4%

Sulphate Ash(Residue On Ignition)

≤0.1%

Specific Optical Rotation

+20.5°–+21.5°

Organic Volatile Impurities

Pass

Assay

99.0%-100.5%

Residual Solvents

Methanol:≤3000 ppm

Total plate count

≤1000 cfu/g

Yeasts& molds

≤100 cfu/g

Escherichia coli

Negative in 1g