Pyridoxal

Pyridoxal
IUPAC name 3-hydroxy-5-(hydroxymethyl)-2-methylpyridine-4-carbaldehyde
Identifiers
CAS number	66-72-8 Y,  65-22-5 (hydrochloride)
PubChem	1050
ChemSpider	1021 Y
UNII	3THM379K8A Y
DrugBank	DB00147
KEGG	C00250 Y
ChEBI	CHEBI:17310 Y
ChEMBL	CHEMBL102970 Y
Jmol-3D images	Image 1
SMILES O=Cc1c(cnc(c1O)C)CO
InChI InChI=1S/C8H9NO3/c1-5-8(12)7(4-11)6(3-10)2-9-5/h2,4,10,12H,3H2,1H3 Y Key: RADKZDMFGJYCBB-UHFFFAOYSA-N Y InChI=1/C8H9NO3/c1-5-8(12)7(4-11)6(3-10)2-9-5/h2,4,10,12H,3H2,1H3 Key: RADKZDMFGJYCBB-UHFFFAOYAP
Properties
Molecular formula	C8H9NO3
Molar mass	167.16 g/mol
Melting point	165 °C (decomp.)
Related compounds
Related arylformaldehydes	Damnacanthal Gossypol
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Pyridoxal is one of the three natural forms of vitamin B₆, along with pyridoxamine and pyridoxine (also called "pyridoxol"). All of these forms are converted in the human body into a single biologically active form, pyridoxal 5-phosphate. All three forms of vitamin B₆ are heterocyclic organic compounds. Green plants are a natural source of pyridoxal, and its deficiency in the human body can lead to serious complications such as epilepsy and seizures.

There are generally three pyridoxal-phosphate (PLP) reactions: transamination, alpha elimination, and beta-elimination.

Pyridoxal is involved in what is believed to be the most ancient reaction of aerobic metabolism on Earth, about 2.9 billion years ago, a forerunner of the Great Oxidation Event