Overview
Kestose reference standard is a trisaccharide composed of one glucose and two fructose units, serving as an essential quality control material in analytical laboratories. As a member of the fructooligosaccharide (FOS) family, it plays a pivotal role in validating analytical methods for prebiotic compounds in both pharmaceutical and food industries. The compound's standardized nature allows researchers to accurately quantify kestose levels in complex matrices like infant formula, functional foods, and dietary supplements. Its high purity (typically ≥98%) makes it indispensable for method development in HPLC-ELSD/RID and enzymatic assays.
Physical and Chemical Properties
Kestose exhibits typical carbohydrate properties with good water solubility (≈100 mg/mL at 25°C) and limited organic solvent compatibility. Its crystalline form remains stable under proper storage conditions, though prolonged exposure to humidity may cause caking. The compound shows optical rotation of [α]D20 +28° to +32° (c=1 in water). Thermogravimetric analysis reveals decomposition beginning at 195°C without distinct melting. The molecule's stability profile makes it suitable for international pharmacopeia standards, with demonstrated 24-month shelf life when stored correctly. pH stability ranges from 4-8 in aqueous solutions at room temperature.
Main Applications
In pharmaceutical quality control, kestose reference standard validates analytical methods for prebiotic preparations and microbiome research products. Food laboratories employ it to standardize FOS quantification in nutritional labeling, particularly for products making gut health claims. The compound serves as a critical marker in honey adulteration detection, where abnormal kestose levels indicate syrup additions. Research institutions use it to study bifidogenic effects and carbohydrate metabolism pathways. Recent applications extend to sports nutrition analysis and glycemic index studies of functional foods.
Safety and Storage
As a non-toxic carbohydrate, kestose requires standard laboratory precautions including gloves and eye protection to prevent contamination. The material poses minimal risk under normal handling conditions, with no significant flammability or reactivity hazards. Optimal storage involves double containment - primary vial inside a desiccator with silica gel, maintained at refrigerated temperatures (2-8°C). For long-term stability, aliquoting into amber glass vials under nitrogen atmosphere is recommended. Opened vials should be equilibrated to room temperature before use to prevent moisture absorption.
B2B Procurement Guide
When sourcing kestose reference standards, prioritize suppliers with ISO 17034 accreditation for reference material production. Essential documentation includes detailed certificates of analysis with batch-specific purity data, method validation reports, and preferably USP/EP/JP compliance statements. For method validation purposes, request impurity profiles showing all peaks above 0.1% in HPLC analysis. Bulk procurement (100g+) typically offers 15-30% cost savings, though stability considerations may favor smaller batches. Leading manufacturers include ChromaDex, USP, and TRC Chemicals, with lead times of 4-8 weeks for customized certifications.
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