Glucono delta-lactone

  • Gluconolactone
  • Glucono- δ -lactone, glucono -1 ,5 -lactone
  • Gluconic acid δ -lactone, gluconic acid -1 ,5 -lactone
  • (3S, 4R, 5R, 6S) -3,4,5 -trihydroxy -6-( hydroxymethyl) tetrahydro- 2H-pyran -2-one
  • E 575

Colorless, sweet-tasting solid

Fixed

Decomposition: 156-162 ° C

Readily soluble in water: 590 g · l-1

Template: Infobox chemical / molecular formula search available

D-( ) -glucono -1 ,5- lactone, and glucono- δ -lactone (GDL ) is derived by intramolecular esterification of gluconic acid lactone. Due to its structural and chemical properties to count it in a broader sense to the carbohydrates.

Properties

GDL is sweet-tasting crystals. Will there be added to water, it partially hydrolyzed to gluconic acid; the more, the warmer and / or basic milieu.

Use

It is used in cleansing agents for the prevention of milk stone.

It is used in the food industry as an acidulant, as acid carrier for baking powder and as a pickle and Umrötungsmittel for sausages. It is in the EU as a food additive called E 575 no maximum limit ( quantum satis ) generally approved for food.

In addition, U.S. researchers at the Massachusetts Institute of Technology have discovered in Cambridge a biological method by which you can turn off the use of glucono -1 ,5-lactone, the specific immune defense against termites, grasshoppers and cockroaches against bacteria and fungi, which for the Animals are deadly. Did they abandon the animals in the laboratory of this substance, they died a few days later of infection. This beneficial insects remain spared as ants, because they have a different immune response. For humans and plants, the use of glucono -1 ,5-lactone is also safe, so it is an environmentally friendly alternative to conventional pesticides against insect pests.

Due to the structural similarity to the intermediate of glycogen phosphorylase ( oxonium ion intermediate), acts glucono -1 ,5- lactone as an inhibitor of this enzyme. It is the first enzyme that ensures rapid deployment of energy for metabolism during the degradation of glycogen.

Safety

The dust may cause eye irritation.

Swell

  • Valerolactone
  • Food additive
  • Polyol
CAS registry number PubChem Hydrolysis Glycogenphosphorylase Digital Object Identifier
211703
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