Flavin mononucleotide

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Structural formula
Structure of flavin mononucleotide
Surname Flavin mononucleotide
other names
  • Riboflavin 5'-phosphate
  • Riboflavin 5 '- (dihydrogen phosphate)
Molecular formula C 17 H 21 N 4 O 9 P
External identifiers / databases
CAS number 146-17-8
EC number 205-664-7
ECHA InfoCard 100.005.150
PubChem 643976
ChemSpider 559060
DrugBank DB03247
Wikidata Q376061
Molar mass 456.34 g mol −1
Physical state


safety instructions
GHS hazard labeling
no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Flavin mononucleotide (FMN) , also riboflavin 5'-phosphate, is derived from the vitamin riboflavin (vitamin B 2 ). It functions as a coenzyme in various oxidoreductases , including NADH dehydrogenase . During the catalytic reaction cycle, starting from the oxidized form as FMN, the compound passes through both the semiquinone - (FMNH · ) and the reduced form (FMNH 2 ). FMN is a stronger oxidizing agent than NAD and is part of such reactions in which not only transfers of hydride ions (i.e. two electrons), but also single electron transfers take place.

Use as a dye

Riboflavin-5'-phosphate is used as a yellow color in food and is produced synthetically from riboflavin. It is used, for example, in the production of cream dishes, desserts, ice cream , confectionery, cheese, mayonnaise , soups and pasta. No side effects are known for the human organism, it is considered harmless. In the EU it is approved as a food additive with the number E  101 (formerly also E 107).

See also

Web links

Individual evidence

  1. This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
  2. Entry on E 101: Riboflavins in the European database on food additives, accessed on June 16, 2020.