Glucose Syrup: DE Grades, Applications and Bulk Supply Guide

Glucose syrup is one of the most widely used liquid sweeteners in food manufacturing, and choosing the right grade is a daily decision for formulators. It is produced by partially hydrolysing starch, which breaks the long starch chains into glucose, maltose and short oligosaccharides. The result is a clear to amber viscous liquid whose behaviour in a formula depends almost entirely on one number: the Dextrose Equivalent, or DE. BIOSTARCH supplies glucose syrup in two controlled DE ranges, DE 20-40 and DE 40-60, made from non-GMO corn or tapioca starch. This guide explains what each grade does, how it behaves in a bakery, confectionery or beverage line, and what to request from a supplier when you buy bulk quantities.

Field	Value
Product	Glucose syrup (corn syrup), DE 20-40 and DE 40-60
Starch source	Non-GMO corn or tapioca starch
Conversion method	Enzymatic hydrolysis, then gentle vacuum concentration
Solids (Brix)	78-82%
pH at 20% solution	4.0-6.0
Sulphur dioxide	Not detected, below 1 ppm
Shelf life	18 months when sealed and stored cool and dry
Supply form	Bulk liquid, drums, IBC totes and tank loads
Supplier	BIOSTARCH

What Is Glucose Syrup?

Glucose syrup is a liquid carbohydrate produced by the partial hydrolysis of starch. Starch is a polymer of glucose units joined by alpha-1,4 and alpha-1,6 bonds. Enzymes cut a portion of those bonds, and the mixture is then concentrated until it reaches a stable solids content. What remains is a syrup containing glucose, maltose and oligosaccharides in proportions set by how far the hydrolysis was allowed to run.

That proportion is what DE measures. A low DE syrup has more of the original long chains, so it behaves more like a thickener and binder. A high DE syrup has been hydrolysed further, so more of the carbohydrate is present as simple sugars, which means higher sweetness, lower viscosity and faster browning. The same word, glucose syrup, therefore covers products that behave quite differently in a formula, which is why the DE range is the first specification to check.

Glucose syrup is also produced without a single additive. No acid processing, no sulphites, no chemical modification and no artificial colour or preservative is involved. The sweetness comes from the carbohydrate itself, which is why it carries a clean label in most regulatory frameworks.

Glucose Syrup and Corn Syrup: The Same Product

In many markets the terms glucose syrup and corn syrup describe the same thing. Corn syrup is glucose syrup whose starch came from corn; the production method and the DE specification are identical, and nothing is added or removed in the naming. When a buyer searches for bulk corn syrup, they are usually looking for exactly the product a buyer of glucose syrup would specify by DE.

There is one point worth separating. The word corn syrup also covers high-fructose corn syrup, where part of the glucose is enzymatically converted into fructose to raise the sweetness profile. That is a different product with different application limits and different labelling rules. Plain corn syrup, which is what a standard DE 42 or DE 60 syrup is, remains glucose syrup.

Choosing Between DE 20-40 and DE 40-60

BIOSTARCH supplies two DE ranges because most formulations need one of two behaviours. Lower DE syrups give body, hold water and resist crystallisation. Higher DE syrups give more sweetness, more solubility and faster colour development. Specifying the range correctly is often the difference between a product that sets properly and one that turns grainy on the line.

Property	DE 20-40	DE 40-60
Sweetness vs sucrose	Low to moderate, roughly 30-50%	Moderate to high, roughly 50-70%
Viscosity	Higher, thicker texture	Lower, more fluid
Moisture retention	Moderate	Higher hygroscopicity
Fermentability	Partially fermentable	Highly fermentable
Maillard browning	Promotes golden browning	Faster browning, more reducing sugar
Freezing point depression	Moderate	Stronger
Typical use	Bakery, fillings, binders	Confectionery, beverages, sauces

How DE Changes Behaviour in a Formulation

Moisture and texture. A DE 20-40 syrup holds more of its own structure, so it works as a humectant that keeps a dough or filling from drying out, and it gives a filling a smooth, spreadable body. A DE 40-60 syrup carries more free sugar, which draws and holds water differently and produces a lighter, cleaner mouthfeel.

Browning. Both grades brown under heat, but a higher DE syrup browns faster and more readily because it contains more reducing sugars. That is useful in a glaze or a baked coating where colour develops on the line, and it is a reason to reduce oven time or temperature when swapping grades.

Crystallisation. Sugars that stay in long chains resist crystallisation; sugars that have been broken down crystallise more readily. A lower DE syrup is the usual choice when a recipe needs to stay soft or glossy over shelf life, such as a filled biscuit or a ganache. A higher DE syrup is the usual choice where a controlled set is wanted, such as a boiled sweet or a hard candy.

Applications by Industry

Bakery

Bakers use glucose syrup as a humectant in breads, buns and soft baked goods, where it keeps the crumb soft for longer. In biscuits and crackers, a lower DE grade acts as a binder and improves tenderness. In laminated dough, it controls syruping of the jam and gives a stable, glossy surface after baking.

Confectionery

Confectioners work with DE as a processing tool. A high DE syrup boils to a controlled set for boiled sweets and hard candy, and it gives a clean, bright sweetness in caramels and toffees. In soft confectionery, a lower DE grade is used to keep the centre tender and to slow moisture migration in a filled sweet.

Beverages and sauces

For beverages, glucose syrup supplies body alongside other sweeteners, keeping a drink from thinning out and giving a smoother mouthfeel. In sauces and dressings, a higher DE grade delivers more sweetness per unit of solids, which means less total solids to carry and a lighter overall profile.

Frozen and chilled desserts

Glucose syrup depresses the freezing point, which is why it is used in ice cream and sorbet to control the scoop and the melt. The higher DE grades give a stronger effect, so a careful ratio is needed when the product also contains other freezing-point depressants such as invert syrup or glycerol.

How to Specify Glucose Syrup for Bulk Purchase

When you request a quotation for bulk glucose syrup, four details decide whether the sample matches the production line.

First, the DE range, and the solids content within it. DE 20-40 and DE 40-60 are not interchangeable in a recipe that has been developed around one of them.

Second, the starch source. Corn and tapioca give slightly different profiles, and switching source in an existing formulation can shift the texture enough to need a re-trial. BIOSTARCH supplies both, and the source is confirmed per order.

Third, the purity parameters. A bulk syrup should arrive with a current certificate of analysis covering Brix, DE, pH, ash, sulphur dioxide, heavy metals and microbiological counts, and with an organic certificate covering the batch.

Fourth, the packing and the delivery format. Bulk quantities arrive in drums, IBC totes or tank loads, and the packaging should be chosen so that the syrup is not repeatedly pumped or reheated, since each transfer adds moisture uptake and a small risk of contamination.

Replacing Sugar with Glucose Syrup

Glucose syrup is usually swapped into a formula that used granulated sugar, and the substitution is rarely one to one. Because the syrup is roughly 78-82% solids, the balance of the weight is water, so a direct swap changes both the sweetness and the moisture content of the batch. The working rule is to replace the sugar by its soluble solids content and then let the solids percentage of the finished product set the water adjustment.

Grade	Sweetness vs sucrose	Solids per 100 kg	Water carried in
DE 20-40	Roughly 30-50%	78-82 kg	18-22 kg
DE 40-60	Roughly 50-70%	78-82 kg	18-22 kg

Two adjustments follow from this. The first is the water: every kilogram of syrup that replaces sugar brings in a fifth of a kilogram of water, so a recipe needs less added liquid or a drier base. The second is the functional side. Sugar contributes sweetness and structure and nothing else, while glucose syrup also brings body, moisture retention and browning, which usually means a shorter bake time or a slightly lower temperature once the syrup is in place.

For clean-label reformulation work, glucose syrup is frequently used to keep a product sweet while reducing the added sugar declaration, because the syrup counts as a sugar but brings functional performance that a high-intensity sweetener cannot. Where a sugar reduction target is set, the DE grade that best preserves the original texture is usually the lower one, since it resists crystallisation and holds moisture in the same way the original sucrose did.

Quality Parameters and Batch Documentation

Every batch is processed in an allergen-controlled facility and tested before release. The parameters below are the standard specification for both DE grades.

Parameter	Specification
Solids (Brix)	78-82%
Dextrose Equivalent	20-40 or 40-60 as specified
pH (20% solution)	4.0-6.0
Sulphur dioxide	Not detected, below 1 ppm
Ash content	Maximum 0.5%
Lead	Maximum 0.1 mg/kg
Arsenic	Maximum 0.1 mg/kg
Cadmium	Maximum 0.05 mg/kg
Mercury	Maximum 0.01 mg/kg
Total plate count	Maximum 1,000 CFU/g
Yeast and mould	Maximum 100 CFU/g
Escherichia coli	Absent

Documentation supplied with a bulk order includes the certificate of analysis, the organic certificate, a specification sheet and the material safety data sheet. All four are issued for the specific lot, so incoming quality control can compare the delivered material against the agreed specification rather than against a generic data sheet.

Questions Buyers Ask About Glucose Syrup

Products from BIOSTARCH

BIOSTARCH supplies the wider organic sweetener and starch range that usually sits alongside glucose syrup in a formulation. Organic glucose syrup is available in both DE ranges with full batch documentation. Organic fructose covers the crystalline grade where a higher sweetness profile is needed, and organic dextrose powder covers the dry monosaccharide form. For texture and structure, organic cornstarch and organic potato starch are supplied in bulk powder grades. Detailed guidance on how the organic dextrose grades differ is available in our guide to choosing between monohydrate and anhydrous dextrose, and the functional side of glucose syrup is covered in the overview of organic glucose syrup.