# Acetolactic acid

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{{Chembox
| Verifiedfields = changed
| Watchedfields = changed
| Name = α-Acetolactic acid
| verifiedrevid = 477239211
| ImageFile = (S)-Acetolactic acid.svg
| ImageSize = 200px
| PIN = (2''S'')-2-Hydroxy-2-methyl-3-oxobutanoic acid
|Section1={{Chembox Identifiers
| CASNo = 71698-08-3
| CASNo_Ref = {{cascite|changed|CAS}}
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = RTS9ADR29A
| PubChem = 440878
| ChemSpiderID = 389710
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 18409
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/C5H8O4/c1-3(6)5(2,9)4(7)8/h9H,1-2H3,(H,7,8)/t5-/m0/s1
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = NMDWGEGFJUBKLB-YFKPBYRVSA-N
| SMILES = O=C(C)[C@](O)(C(=O)O)C
| InChI = InChI=1S/C5H8O4/c1-3(6)5(2,9)4(7)8/h9H,1-2H3,(H,7,8)/t5-/m0/s1
  }}
|Section2={{Chembox Properties
| C=5 | H=8 | O=4
| Appearance = 
| Density = 
| MeltingPt = 
| BoilingPt = 
| Solubility =
  }}
|Section3={{Chembox Hazards
| MainHazards = 
| FlashPt = 
| AutoignitionPt =
  }}
}}

'''α-Acetolactic acid''' is a precursor in the biosynthesis of the branched chain amino acids [valine](/source/valine) and [leucine](/source/leucine). α-Acetolactic acid is produced from two molecules of [pyruvic acid](/source/pyruvic_acid) by [acetolactate synthase](/source/acetolactate_synthase). α-Acetolactic acid can also be [decarboxylated](/source/decarboxylation) by alpha-[acetolactate decarboxylase](/source/acetolactate_decarboxylase) to produce [acetoin](/source/acetoin).<ref>{{cite book | chapter-url = https://books.google.com/books?id=Q8B_WusVacsC&pg=PA185 | chapter = Carbohydrate Metabolism | isbn = 978-0-7514-0215-5 | volume =2 | title = The Lactic Acid Bacteria: The genera of lactic acid bacteria | publisher = Springer | year = 1995 | first1 = B. J. B. | last1 =Wood | first2 = W. H. | last2 = Holzapfel | pages = 185–186}}</ref><ref>{{cite book | chapter-url =https://books.google.com/books?id=Sabnh9l76W0C&pg=PA283 | title =Applied dairy microbiology | publisher = CRC Press | year =  2001 | isbn = 978-0-8247-0536-7 | volume = 110 of Food science and technology. A series of monographs | first1 = E. H. | last1 =Marth | first2 = J. L. | last2 =Steele | pages = 283 | chapter = Genetics of Lactic acid bacteria}}</ref> The name '''α-acetolactate''' is used for  [anion](/source/anion) ([conjugate base](/source/conjugate_base)), [salt](/source/Salt_(chemistry))s, and [ester](/source/ester)s of α-acetolactic acid.

==References==
{{Reflist}}

Category:Alpha hydroxycarboxylic acids
Category:Beta-keto acids

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Adapted from the Wikipedia article [Acetolactic acid](https://en.wikipedia.org/wiki/Acetolactic_acid) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Acetolactic_acid?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.