VC

specification (BP 2004/USP28/FCCV)

Appearance: white to slightly yellowish crystalline power

Identification positive reaction

Clarity of solution (5% solution) clear

Color of solution BY7

Assay 99.0%~100.5

Particle size (%) mesh No.20 100

Loss on drying <0.2%

residue on ignition max 0.1%

specific rotation +20.5~+2105 degrees

PH (5% in water) 2.2~2.5

heavy metals (as pb) max.10ppm

lead max.5ppm

zinc max.25ppm

copper max.5ppm

iron max.2ppm

arsenic max.3ppm

oxalic acid max.0.2%

shelf life 2 years