Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 6184-17-4, Whether you call it Riboflavin 5�-Phosphate Sodium, FMN Sodium Salt , Flavin Mononucleotide Sodium Salt , Riboflavin Sodium Phosphate , Vitamin B_-2 Phosphate or Sodium Riboflavin Phosphate you can be assured the Riboflavin 5�-Phosphate Sodium products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.