IUPAC Name: (3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)oxan-2-one
The molecular formula of Glucono delta-lactone (CAS NO.90-80-2) is C₆H₁₀O₆.

                                      
The molecular weight of Glucono delta-lactone (CAS NO.90-80-2) is 178.14.
Synonyms of Glucono delta-lactone (CAS NO.90-80-2): Gluconic acid lactone (6CI) ;  Gluconic acid, lactone, D- (7CI) ; Gluconic acid, .delta.-lactone, D- (8CI) ; 1,5-Gluconolactone ; D-(+)-Gluconic acid .delta.-lactone ; D-Gluconic acid 1,5-lactone ; D-Gluconic acid lactone ; D-Glucono-1,5-lactone ; D-Glucono-.delta.-lactone ; E 575 ; Fujiglucon ; Gluconolactone ; .delta.-Gluconolactone
Product Categories: Sugars, Carbohydrates & Glucosides
Apperance: white odorless crystalline powder
Index of Refraction: 1.607 
EINECS: 202-016-5
Density: 1.72 g/ml 
Flash Point: 192.3 °C
Boiling Point: 446.4 °C
Melting Point: 160 °C

  Glucono delta-lactone (CAS NO.90-80-2) is a naturally-occurring food additive used as a sequestrant, an acidifier, or a curing, pickling, or leavening agent. It is a lactone (cyclic ester) of D-gluconic acid.GDL may also be useful in controlling termites by weakening their immune system.

Safety information of Glucono delta-lactone (CAS NO.90-80-2):
Safety Statements  24/25
S24/25:Avoid contact with skin and eyes.
WGK Germany  3
RTECS  LZ5184000
F  21

 GDL is commonly found in honey, fruit juices, and wine. GDL is neutral, but hydrolyses in water to gluconic acid which is acidic, adding 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 yields roughly the same amount of metabolic energy as one gram of sugar.
 Upon addition to water, GDL is partially hydrolysed to gluconic acid, with the balance between the lactone form and the acid form established as a chemical equilibrium. The rate of hydrolysis of GDL is increased by heat and high pH.