维生素C细粉

Analysis Contents

Analysis standard

Analysis Results

Appearance

White or Almost white Crystalline Powder

Pass

Identtification

Positive Reaction

Positive

Melting Point

About 190℃

 190℃

PH

2.1—2.6

2.4

Clarity of Solution

Clrae

Pass

Colour of Solution

≤BY7

<BY7

Heavy Metals

≤10ppm

<10ppm

Iron

≤2ppm

<2ppm

Copper

≤5ppm

<5ppm

Impurity E

≤0.2%

<0.2%

Sulphate ash(Residue on Ignition)

≤0.1%

<0.1%

Specific Optical Rotation

+20.5°--+21.5°

+20.9°

Assay

99.0%--100.5%

99.8%

Particles Size

Not less than 95% through 100 mesh

98.5%

Conclusion: The above product conforms to   In-house standard