Orotic acid

Orotic acid (/ɔːˈrɒtɪk/) is a pyrimidinedione and a carboxylic acid. Historically, it was believed to be part of the vitamin B complex and was called vitamin B13, but it is now known that it is not a vitamin.

Orotic acid
Clinical data
Other namesuracil-6-carboxylic acid
AHFS/Drugs.comInternational Drug Names
ATC code
  • none
Identifiers
  • 1,2,3,6-Tetrahydro-2,6-dioxo-4-pyrimidinecarboxylic acid
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
CompTox Dashboard (EPA)
ECHA InfoCard100.000.563
Chemical and physical data
FormulaC5H4N2O4
Molar mass156.097 g·mol−1
3D model (JSmol)
  • O=C(O)\C1=C\C(=O)NC(=O)N1
  • InChI=1S/C5H4N2O4/c8-3-1-2(4(9)10)6-5(11)7-3/h1H,(H,9,10)(H2,6,7,8,11) N
  • Key:PXQPEWDEAKTCGB-UHFFFAOYSA-N N
 NY (what is this?)  (verify)

The compound is synthesized in the body via a mitochondrial enzyme, dihydroorotate dehydrogenase or a cytoplasmic enzyme of pyrimidine synthesis pathway. It is sometimes used as a mineral carrier in some dietary supplements (to increase their bioavailability), most commonly for lithium orotate.

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