Glucono Delta Lactone

CAS NO. 90-80-2

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food acidulant tofu coagulant meat processing chemicals Food Additive plant-based

Product Description

Applications

Parameter	Specification
Chemical Name	Glucono Delta-Lactone
Synonyms	GDL; Gluconolactone; D-Glucono-1,5-lactone; Glucono-δ-lactone
CAS Number	90-80-2
EC Number	202-016-5
Food Additive Number	E575 / INS 575
Molecular Formula	C₆H₁₀O₆
Molecular Weight	178.14 g/mol
Appearance	White crystalline powder, almost odorless
Assay (C₆H₁₀O₆)	≥ 99.0%
Melting Point	150 – 154 °C
pH (1% aqueous solution, 25 °C)	2.5 – 3.5
Solubility	Freely soluble in water; slightly soluble in ethanol
Moisture Content	≤ 1.0%
Reducing Substances	≤ 0.5%
Sulfate (SO₄²⁻)	≤ 0.03%
Chloride (Cl⁻)	≤ 0.02%
Heavy Metals (as Pb)	≤ 0.002% (20 ppm)
Arsenic (As)	≤ 3.0 mg/kg
Lead (Pb)	≤ 2.0 mg/kg
Particle Size	Fine powder, 80 mesh
Standard Packaging	25 kg bag with PE liner \| custom packaging on request
Shelf Life	24 months from date of manufacture, in unopened original packaging, stored in a cool, dry place away from direct sunlight.

✓ Conforms to USP, FCC and JECFA monograph requirements. Each shipment is supplied with a batch-specific Certificate of Analysis (CoA) on request.

Product Overview

Nexal Inc. supplies Glucono Delta-Lactone (GDL, CAS 90-80-2), a white crystalline powder that hydrolyzes slowly in water to gluconic acid, producing a gradual, controlled drop in pH. GDL is a multi-compendia listed material conforming to USP, FCC and JECFA specifications, identified internationally as food additive E575 / INS 575.

Each shipment is supported by a batch-specific Certificate of Analysis. Suitability of the material for any specific end-use formulation should be evaluated by the buyer.

Applications of Glucono Delta-Lactone (GDL, CAS 90-80-2)

Glucono Delta-Lactone (GDL, gluconolactone, E575) is the cyclic ester of D-gluconic acid. In aqueous systems it hydrolyzes gradually to gluconic acid, producing a controlled pH descent rather than an immediate acid release. This slow-release behavior is the basis for its long-established use in food, beverage, and personal-care formulations. Nexal Inc. distributes USP/FCC-grade GDL.

• Food Manufacturing

GDL has been used for decades as a slow-release acidulant in protein coagulation, chemical leavening, and meat-curing systems. The gradual hydrolysis allows uniform pH reduction without the harshness of strong acids.

End Products: silken tofu, fresh cheeses (cottage, ricotta), cured meat products, fermented sausages, baked goods using chemical leavening systems.

• Plant-Based & Specialty Food

Used as an acidification ingredient in plant-protein coagulation systems and dairy-alternative formulations, where controlled pH descent supports texture development. The mechanism mirrors the traditional tofu coagulation chemistry that has been documented in food science literature for many decades.

End Products: plant-protein blocks, dairy-alternative products, non-dairy desserts, vegetarian deli items.

• Beverage Industry

Functions as a mild acidulant in beverage and powder-blend systems where a clean, low-tartness pH adjustment is preferred over citric or phosphoric acids. The slow hydrolysis profile fits dry-blend applications where the acid response should develop after reconstitution rather than during storage.

End Products: functional beverages, fruit juice blends, instant powder drink mixes, flavored waters, sports beverage powders.

• Personal Care Formulation

Glucono delta-lactone belongs to the polyhydroxy acid (PHA) family and is used in pH-adjusted topical formulations as a mild acid donor. Buyers are responsible for finished-product testing and applicable cosmetic regulations in the destination market.

End Products: facial toners, lotions, pH-adjusted topical formulations, hair-care rinses.

Key Technical Property: GDL hydrolyzes to gluconic acid in aqueous systems with a kinetic profile that depends on temperature, concentration, and pH — typically reaching equilibrium over minutes to hours at ambient conditions. This slow-release acidulation behavior is what distinguishes GDL from direct-addition acidulants in formulation work.