Vitamin B2  (Riboflavin)

Packaging and Storage               Stored in well closed-containers

Appearance                               Orange Yellow Crystalline Powder

Fibers                                        Free of Fibers

Particle Size                              Not less than 90% through an 60 mesh

Assay                                        98.0%-----102.0% on dried basis  (USP24)

                                                 98.0%-----101.0% on dried basis  (BP98 )

Identification                               In water is pale yellow, and has an intense

                                                 yellowish green fluorescence which

                                                 disappears upon the addition of mineral acids or alkalies

Specific Rotation                         Between +56.5º and +59.5º  (USP25)

                                                 Between -115º and -135º     (BP98 )

Loss on Drying                           Not more than 1.5%

Residue on Ignition                      Not more than 0.3%   (USP25)

                                                 Not more than 0.1%   (BP98)

Limit of Lumiflavin                       Absorbance of the filtrate at 440nm does not exceed 0.025

Organic Volatile Impurities          -Meet the USP requirements.