Overview
Liquid Glucose Syrup is a starch-derived sweetener produced through enzymatic or acid hydrolysis. It consists primarily of glucose, maltose, and oligosaccharides, with its sweetness and viscosity determined by the Dextrose Equivalent (DE) value. Widely used in food and pharmaceuticals, it serves as a humectant, sweetener, and texture modifier. Industrial-grade liquid glucose is standardized by DE (e.g., DE 42 or DE 63), which influences its functionality. Unlike high-fructose corn syrup, it resists crystallization, making it ideal for confectionery and frozen desserts. Pharmaceutical grades meet USP/EP standards for parenteral and oral formulations.
Physical and Chemical Properties
The syrup exhibits high viscosity (typically 3,000–5,000 cP at 25°C) and hygroscopicity due to its polyol content. Its reducing sugar content facilitates Maillard reactions in food processing. The refractive index (~1.49) and density help in quality control during production. Chemically stable under neutral pH, liquid glucose may caramelize at temperatures above 110°C. It shows excellent compatibility with other carbohydrates and minimal reactivity with metals, though stainless steel equipment is recommended for handling to prevent contamination.
Main Applications
In food manufacturing, it prevents sugar crystallization in candies, improves moisture retention in baked goods, and enhances mouthfeel in beverages. The brewing industry uses it as a fermentable sugar source. Confectionery applications dominate, accounting for ~40% of global demand. Pharmaceutical uses include syrup bases for drug suspensions and energy sources in IV solutions. Industrial applications extend to adhesives and textile sizing due to its binding properties. Specialty grades serve as cryoprotectants in biologics storage.
Safety and Storage
Food-grade syrups are GRAS-certified (FDA 21CFR184.1865), but workplace exposure to airborne mists should be controlled. Bulk storage tanks require agitators to prevent sedimentation. Microbial growth is unlikely at ≥70% solids content. For transport, maintain temperatures between 15-30°C to avoid viscosity changes. Use food-grade hoses and pumps for transfer. Spills create slip hazards—clean immediately with water. Shelf life typically exceeds 12 months in sealed containers.
B2B Procurement Guide
Specify DE value (higher DE = sweeter, lower viscosity), dry solids content (commonly 70-80%), and impurity limits (e.g., sulfated ash <0.5%). Kosher/Halal certification may be required for food clients. Pharmaceutical buyers should request USP-NF testing documentation. Bulk shipments (ISO tankers or flexitanks) reduce costs for orders >20 metric tons. Sample testing for color (ICUMSA <50) and odor is recommended. Consider regional starch sources—corn-based (North America) vs. wheat-based (EU) syrups may have different allergen profiles.
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