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Glucono delta-lactone

Glucono delta-lactone[1][2]
IUPAC name 3,4,5-trihydroxy-6-(hydroxymethyl)- 2-tetrahydropyranone
CAS number 90-80-2
PubChem 736
Molecular formula C6H10O6
Molar mass 178.14
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Glucono delta-lactone (GDL) is a naturally-occurring food additive used as a sequestrant, an acidifier, or a curing, pickling, or leavening agent. It is a cyclic ester of D-gluconic acid. Pure GDL is a white odorless crystalline powder.

GDL is commonly found in honey, fruit juices, and wine. Being acidic, it adds a tangy taste to foods, though it has roughly a third of the sourness of citric acid. It is metabolized to glucose; one gram of GDL is equivalent to one gram of sugar.

Glucono-delta-lactone, upon addition to water readily forms an equilibrium mixture of the lactone GDL and gluconic acid. The rate of hydrolysis of GDL is accelerated by heat and high pH.[3]


  1. ^ Merck Index, 13th Edition, 4469.
  2. ^ Beil. 18, V, 5, 11
  3. ^ Pocker & Green, 1973
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Glucono_delta-lactone". A list of authors is available in Wikipedia.
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