Аскорбил пальмитат

ITEM

STANDARD

Appearance

A white or yellow-white powder

Assay(on dry basis)

98.0%-100.5%

Whiteness

Not less than 68

State of solution

Clear and not more than BY4

Optical rotation

Between +20.5 and +24°

Melting range

Between 107°C and 117 °C

Loss on Drying

No more than 0.8%

Residue on ignition

No more than 0.1%

Sulphated ash

No more than 0.1%

Bacteria amount

No more than 1000 cfu/g

Coliforms bacteria

No more than 30 MPN/100g

Pathogenic bacteria(salmonella、shigella、staphylococcus aureus)

Negative

Heavy metal(as Pb)

No more than 4 ppm