Glucono-δ-Lactone (GDL, E575) CAS 90-80-2 is white crystalline powder, a slow‑release acidulant derived from glucose fermentation. It gradually hydrolyses into gluconic acid in water, widely used as tofu coagulant, acidity regulator and preservative for food, pharma and cosmetic formulations. TNJ Chemical supplies food grade & USP grade GDL with stable quality and competitive price, samples and full‑set documents are available.
Basic Product Information
Product name: Glucono‑δ‑Lactone (GDL)
CAS‑No：90‑80‑2
Synonym：D‑Glucono‑1,5‑lactone, Gluconolactone, E575
Molecular Formula：C6H10O6
Molecular Weight：178.14
EINECS：202‑016‑5
Appearance: White crystalline powder, almost odorless
Grade: Food grade / Pharma grade (comply with USP / FCC)
Physic‑chemical Properties
Solubility Freely soluble in water; slightly soluble in ethanol
Melting point 151‑155 ℃ (decompose)
pH (1% aqueous solution) 3.5‑4.5, slowly hydrolyses to gluconic acid
Quality Specification (Food & USP Grade)
| Test Item | Standard |
|---|---|
| Appearance | White crystalline powder |
| Assay | 99.0‑101.0 % |
| Loss on drying | ≤1.0 % |
| Reducing substances | ≤0.5 % |
| Sulphated ash | ≤0.1 % |
| Heavy metals (Pb) | ≤10 ppm |
| Arsenic | ≤3 ppm |
Application & Use
Food: Tofu coagulant, acidity regulator, raising agent for bakery, meat preservative (E575).
Pharmaceutical: Excipient, mild acidifier for formulations, meets USP standard.
Cosmetics: Gentle pH adjuster, chelating agent.
Packing
25 kg paper bag with PE inner liner.
Storage & Transportation
Keep tightly sealed, store in cool, dry, ventilated warehouse, protect from moisture.
Shelf‑life: 24 months under original sealed condition.
Transport as general food‑grade chemical.
Disclaimer: This data sheet is for reference only, not contractual standard.
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