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Kekulé, skeletal formula of a minor riboflavin (-10-[(2S,3S,4R)-2,3,4-trihydroxypentyl]) tautomer
Spacefill model of a minor riboflavin (-10-[(2S,3S,4R)-2,3,4-trihydroxypentyl]) tautomer
Sample of microcrystaline riboflavin
IUPAC name
3D model (JSmol)
3DMet B01201
ECHA InfoCard 100.001.370
EC Nummer 201-507-1
E nummer E101 (colours)
MeSH Riboflavin
Molar mass 376.37 g·mol−1
Appearance Orange crystals
log P 0.095
Acidity (pKa) 9.888
Basicity (pKb) 4.109
NFPA 704
Flammability code 1: Must be pre-heatit afore igneetion can occur. Flash pynt ower 93 °C (200 °F). E.g., canola ileHealth code 1: Exposur would cause irritation but anly minor residual injury. E.g., turpentineReactivity code 0: Normally stable, even unner fire exposur condeetions, an is nae reactive wi watter. E.g., liquid nitrogenSpecial hazards (white): no codeNFPA 704 four-colored diamond
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
YesY verify (whit is YesYN ?)
Infobox references

Riboflavin, forby kent as vitamin B2 is an easy absorbit coloured micronutrient wi a key role in maintainin health in humans an ainimals. It is the central component o the cofactors FAD an FMN, an is syne required bi aw flavoproteins. In that wey, vitamin B2 is required for a wide variety o cellular processes. It plays a key role in energy metabolism, an for the metabolism o fats, ketone bodies, carbohydrates, an proteins.

Milk, cheese, leaf vegetables, liver, kidneys, legumes, baurm, puddock-stuils, an awmonds[2] are guid soorces o vitamin B2, but exposure tae licht destroys riboflavin.

The name "riboflavin" comes frae "ribose" (the succar whase reduced fairm, ribitol, fairms pairt o its structur) an "flavin", the ring-moiety whilk imparts the yellae colour tae the oxidized molecule (frae Latin flavus, "yellae"). The reduced fairm, whilk occurs in metabolism alang wi the oxidised fairm, is colourless.

Riboflavin is baist kent visually as the vitamin whilk imparts the orange colour tae solit B-vitamin preparations, the yellae colour tae vitamin supplement solutions, an the orra fluorescent-yellae colour tae the urine o persons wha supplement wi heich-dose B-complex preparations (nae ither vitamin imparts ony colour tae urine).

Riboflavin can be uised as a deliberate orange-reid fuid colour additive, an is syne designatit in Europe as the E nummer E101.[3]

References[eedit | eedit soorce]

  1. PubChem 493570
  2. Higdon, Jane (2007). "Riboflavin". Micronutrient Information Center. Linus Pauling Institute at Oregon State University. Retrieved December 3, 2009.  Unkent parameter |coauthors= ignored (help)
  3. "Current EU approved additives and their E Numbers". UK Food Standards Agency. July 27, 2007. Retrieved December 3, 2009. 

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