delta-Gluconolactone CAS NO.90-80-2

D-(+)-Glucono-1,5-lactone | CAS 90-80-2 – Food Grade Coagulant & Acidifier

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D-(+)-Glucono-1,5-lactone | CAS 90-80-2 – Food Grade Coagulant & Acidifier

Basic Information

• Product Name: D-(+)-Glucono-1,5-lactone

• CAS Number: 90-80-2

• Chemical Formula: C6H10O6

• Molecular Weight: 178.14 g/mol

• EC Number: 202-016-5

• Appearance: White crystalline powder

• Purity: ≥ 99%

Other Names

• GDL

• Gluconolactone

• D-Gluconic acid δ-lactone

• D-Glucono-1,5-lactone

• δ-Gluconolactone

• E575 (EU food additive code)

What is D-(+)-Glucono-1,5-lactone (GDL)?

D-(+)-Glucono-1,5-lactone (GDL) is a naturally occurring, water-soluble lactone derived from D-gluconic acid. With a mild, slightly sweet taste, it is commonly used in the food, cosmetic, and pharmaceutical industries as a slow-releasing acidifier, coagulant, and chelating agent. Upon hydrolysis in water, GDL gradually converts into gluconic acid, lowering pH in a controlled manner—making it ideal for applications that require slow acidification.

Applications of D-(+)-Glucono-1,5-lactone (CAS 90-80-2)

1. Food Industry (E575)

• Tofu coagulant: Commonly used in Asian food products to gently coagulate soy proteins.

• pH regulator and preservative: Helps preserve taste and shelf-life in baked goods, cured meats, cheeses, and beverages.

• Acidifier: Used in dairy and plant-based products to impart mild acidity.

• Leavening agent: Used in combination with baking soda for controlled gas release.

2. Cosmetic Industry

• Functions as a chelating agent, skin conditioning agent, and pH adjuster.

• Included in skincare formulas for anti-aging and exfoliation benefits due to its PHA (polyhydroxy acid) properties, which are gentler than AHAs.

3. Pharmaceutical Applications

• Acts as a tablet binder, stabilizer, and pH control agent in oral and topical formulations.

4. Industrial and Technical Use

• Utilized in electroplating, cleaning formulations, and metal chelation processes.

• Used in cement and concrete admixtures to improve setting time and durability.

Product Specifications

Property	Specification
Appearance	White crystalline powder
Assay (Purity)	≥ 99%
Solubility	Soluble in water
Melting Point	151–153 °C
pH (1% solution)	~2.5–3.5
Heavy Metals	< 5 ppm
Loss on Drying	≤ 0.5%
Packaging	25kg fiber drum / kraft paper bag / custom
Storage	Cool, dry place in sealed container

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